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A rare subtype of axonal hereditary motor and sensory neuropathy characterized by progressive distal muscle weakness and atrophy of both the lower and upper limbs, absent or reduced deep tendon reflexes, mild sensory loss, foot drop, and pes cavus leading eventually to wheelchair dependance. Some patients present with early hypotonia and delayed motor development. Scoliosis and variable autonomic disturbances may be associated. |
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A rare autosomal recessive axonal hereditary motor and sensory neuropathy characterized by adult onset of slowly progressive distal muscle weakness and atrophy, sensory impairment, and decreased or absent deep tendon reflexes predominantly in the lower extremities. Patients present gait disturbances but remain ambulatory. Mild involvement of the upper limbs may be seen. |
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Charcot-Marie-Tooth disease type 4A (CMT4A) is a subtype of Charcot-Marie-Tooth disease type 4 characterized by early-onset (infancy to early childhood) of severe, rapidly progressing demyelinating, axonal, or intermediate sensorimotor neuropathy usually affecting first, and more severely, the distal lower extremities and later the proximal muscles and upper extremities. Nerve conduction velocities range from very slow to normal. Apart from the typical CMT phenotype (distal muscle weakness and atrophy, sensory loss, frequent pes cavus foot deformity), patients commonly present delayed motor development, vocal cord paresis, mild sensory loss, abolished deep tendon reflexes, and skeletal deformities. |
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Charcot-Marie-Tooth disease type 4B1 (CMT4B1) is a subtype of Charcot-Marie-Tooth disease type 4 characterized by an early childhood-onset of severe, demyelinating sensorimotor neuropathy, various degrees of complex myelin outfoldings seen on peripheral nerve biopsy, very slow, and often undetectable, nerve conduction velocities, and the typical CMT phenotype (i.e. distal muscle weakness and atrophy, sensory loss, and frequent pes cavus). Other reported features include facial weakness, vocal cord paresis, respiratory difficulties, and skeletal deformities (e.g. chest deformities, claw hands, pes equinovarus). |
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Charcot-Marie-Tooth disease type 4B2 (CMT4B2) is a subtype of Charcot-Marie-Tooth type 4 characterized by a severe, early childhood-onset of demyelinating sensorimotor neuropathy, early-onset glaucoma, focally folded myelin sheaths in the peripheral nerves, severely reduced nerve conduction velocities, and the typical CMT phenotype (i.e. distal muscle weakness and atrophy, sensory loss, and frequent pes cavus). Severe visual impairment leading to visual loss has also been reported. |
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Charcot-Marie-Tooth disease type 4B3 (CMT4B3) is a subtype of Charcot-Marie-Tooth type 4 characterized by a childhood onset of slowly progressing, demyelinating sensorimotor neuropathy, focally folded myelin sheaths in nerve biopsy, reduced nerve conduction velocities (less than 38 m/s), and the typical CMT phenotype (i.e. distal muscle weakness and atrophy, and sensory loss). |
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Charcot-Marie-Tooth disease type 4C (CMT4C) is a subtype of Charcot-Marie-Tooth type 4 characterized by childhood or adolescent-onset of a relatively mild, demyelinating sensorimotor neuropathy that contrasts with a severe, rapidly progressing, early-onset scoliosis, and the typical CMT phenotype (i.e. distal muscle weakness and atrophy, sensory loss, and often foot deformity). A wide spectrum of nerve conduction velocities are observed and cranial nerve involvement and kyphoscoliosis have also been reported. |
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Charcot-Marie-Tooth disease type 4D (CMT4D) is a subtype of Charcot-Marie-Tooth disease type 4 characterized by a childhood-onset of severe, progressive, demyelinating sensorimotor neuropathy manifesting with distal muscle weakness and atrophy, sensorineural hearing impairment leading to deafness (usually in third decade), severely reduced nerve conduction velocities, and skeletal, especially foot, deformities. Tongue atrophy has also been reported. |
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Charcot-Marie-Tooth disease type 4E (CMT4E) is a congenital, hypomyelinating subtype of Charcot-Marie-Tooth disease type 4 characterized by a Dejerine-Sottas syndrome-like phenotype (including hypotonia and/or delayed motor development in infancy), extremely slow nerve conduction velocities, potential respiratory dysfunction, cranial nerve involvement, and the typical CMT phenotype, i.e. distal muscle weakness and atrophy, sensory loss, and foot deformity. |
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Charcot-Marie-Tooth disease type 4F (CMT4F) is a severe, demyelinating subtype of Charcot-Marie-Tooth disease type 4 characterised by the childhood onset of a slowly-progressing typical CMT phenotype (i.e. distal muscle weakness and atrophy, as well as pes cavus) that presents severe sensory loss (frequently with sensory ataxia), moderately to severely reduced motor nerve conduction velocities and almost invariable absence of sensory nerve action potentials, and delayed motor milestones. |
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Charcot-Marie-Tooth disease type 4G (CMT4G) is a subtype of Charcot-Marie-Tooth disease type 4 characterized by early childhood onset of progressive distal muscle weakness and atrophy, delayed motor development, prominent distal sensory impairment, areflexia, moderately reduced nerve conduction velocities, and foot and hand deformities in Balkan (Russe) Gypsies. |
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Charcot-Marie-Tooth disease type 4H is a subtype of Charcot-Marie-Tooth disease type 4 characterized by onset before two years of age of severe, slowly progressive, demyelinating sensorimotor neuropathy manifesting with delayed motor development (walking), unsteady gait, distal muscle weakness and atrophy (more prominent in the lower limbs), areflexia, mild symmetrical stocking-distribution hypoesthesia, and skeletal malformations (including kyphoscoliosis, short neck, pes cavus and pes equinus). Severely reduced nerve conduction velocities are associated. |
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Charcot-Marie-Tooth disease type 4J is a subtype of Charcot-Marie-Tooth disease type 4 characterized by childhood- to adulthood-onset of variably severe, rapidly progressive, axonal and demyelinating sensorimotor neuropathy typically manifesting with delayed motor development, proximal and distal asymmetric muscle weakness and atrophy of the lower and upper extremities, severe motor dysfunction with mildly reduced sensory impairment, and areflexia. Nerve conduction velocities range from very mildly to severely reduced. |
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Charcot-Marie-Tooth disease type 1D (CMT1D) is a form of CMT1, caused by mutations in the EGR2 gene (10q21.1), with a variable severity and age of onset (from infancy to adulthood), that usually presents with gait abnormalities, progressive wasting and weakness of distal limb muscles, with possible later involvement of proximal muscles, foot deformity and severe reduction in nerve conduction velocity. Additional features may include scoliosis, cranial nerve deficits such as diplopia, and bilateral vocal cord paresis. |
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A rare subtype of CMT1 characterized by a variable clinical presentation. Onset within the first two years of life with a delay in walking is not uncommon; however, onset may occur later. CMT1E is caused by point mutations in the PMP22 (17p12) gene. The disease severity depends on the particular PMP22 mutation, with some cases being very mild and even resembling hereditary neuropathy with liability to pressure palsies, while others having an earlier onset with a more severe phenotype (reminiscent of Dejerine-Sottas syndrome) than that seen in CMT1A, caused by gene duplication. These severe cases may also report deafness and much slower motor nerve conduction velocities compared to CMT1A patients. |
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Charcot-Marie-Tooth disease type 1F (CMT1F) is a form of CMT1, with a variable clinical presentation that can range from severe impairment with onset in childhood to mild impairment appearing during adulthood. CMT1F is characterized by a progressive peripheral motor and sensory neuropathy with distal paresis in the lower limbs that varies from mild weakness to complete paralysis of the distal muscle groups, absent tendon reflexes and reduced nerve conduction. CMT1F represents the demyelinating form of CMT2E and is caused by mutations in the NEFL gene (8p21.2). |
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Charcot-Marie-Tooth disease-deafness-intellectual disability syndrome is a rare demyelinating hereditary motor and sensory neuropathy characterised by early-onset, slowly progressive, distal muscular weakness and atrophy with no sensory impairment, congenital sensorineural deafness and mild intellectual disability (with absence of normal speech development). The absence of large, myelinated fibres on sural nerve biopsy is equally characteristic of the disease. |
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A rare multiple congenital anomalies/dysmorphic syndrome characterized by the common manifestations found in oromandibular-limb hypogenesis syndromes (OLHS) group such as hypoplasia of the mandible, variable limb anomalies like syndactyly and ectrodactyly, small mouth, cleft palate and hypodontia, accompanied by other clinical signs such as facial paralysis, facial asymmetry, hypertelorism, hypoglossia/aglossia, absent or conically crowned incisors and, ectromelia. There have been no further descriptions in the literature since 1976. |
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Childhood encephalopathy due to thiamine pyrophosphokinase deficiency is a rare inborn error of metabolism disorder characterized by early-onset, acute, encephalopathic episodes (frequently triggered by viral infections), associated with lactic acidosis and alpha-ketoglutaric aciduria, which typically manifest with variable degrees of ataxia, generalized developmental regression (which deteriorates with each episode) and dystonia. Other manifestations include spasticity, seizures, truncal hypotonia, limb hypertonia, brisk tendon reflexes and reversible coma. |
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Cardiac tumors are benign or malignant neoplasms arising primarily in the inner lining, muscle layer, or the surrounding pericardium of the heart. They can be primary or metastatic. |
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A rare, genetic, non-dystrophic myopathy disease characterized by childhood-onset severe external ophthalmoplegia, typically without ptosis, associated with mild, very slowly progressive muscular weakness and atrophy, involving the facial, neck flexor and limb (upper > lower, proximal > distal) muscles. Muscle biopsy shows type 1 fiber uniformity, absent, or abnormally small, type 2A fibers, increased variability of fiber size, internalized nuclei and/or fatty infiltration. |
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A rare, genetic, autosomal recessive cerebellar ataxia disease characterized by slowly progressive spinocerebellar ataxia developing during childhood, manifesting with gait and limb ataxia, postural tremor, dysarthria, sensory alterations (e.g. decreased vibration sense), eye movement anomalies (i.e. nystagmus, saccadic pursuit, oculomotor apraxia), upper and lower limb fasciculations, and hyperreflexia with Babinski signs. Brain imaging reveals cerebellar, pontine, vermian and medullar atrophy. |
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A rare genetic neurodegenerative disease characterized by sudden onset of progressive motor deterioration and regression of developmental milestones. Manifestations include dystonia and muscle spasms, dysphagia, dysarthria, and eventually loss of speech and ambulation. Brain MRI shows predominantly striatal abnormalities. The disease is potentially associated with a fatal outcome. |
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A rare genetic hyperkinetic movement disorder characterized predominantly by chorea of variable severity, associated with bilateral striatal abnormalities on cerebral MRI. The disease is scarcely progressive, and cognitive performance is preserved in the majority of cases, although mild cognitive delay has also been reported. |
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A rare genetic neurodegenerative disease characterized by childhood onset of slowly progressive motor and cognitive regression, resulting in intellectual disability and loss of language and ambulation, associated with the appearance of dystonia, parkinsonism, chorea, or rigidity. Ataxia, dysarthria, and seizures have also been reported. Head circumference percentiles may decline over time. Brain imaging shows progressive cerebral and cerebellar atrophy, in some patients also thinning of the corpus callosum. |
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Childhood onset nemaline myopathy, or mild nemaline myopathy is a type of nemaline myopathy characterized by distal muscle weakness, and sometimes slowness of muscle contraction. |
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A progressive muscular dystrophy characterized by co-existence of limb-girdle weakness and diffuse joint contractures without cardiomyopathy. Patients present lower limb weakness progressing to involve also upper limbs and axial muscles and eventually leading to permanent loss of ambulation, widespread joint contractures in the limbs and sometimes the spine, and variable respiratory involvement. Morphological changes in muscle biopsies include rimmed vacuoles, increased internal nuclei, cytoplasmic bodies, and a dystrophic pattern. |
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A rare neurologic disease with psychiatric involvement with characteristics of prominent pre-psychotic developmental disabilities (cognitive, language, motor), socio-communicative disturbances, auditory hallucinations (visual and tactile hallucinations are rarer) preceding psychotic symptoms, presenting before 13 years of age. Co-occurrence of neurodevelopmental disorders (e.g. autism spectrum disorders, attention deficit hyperactivity disorder) is frequent. Disease course is more severe than adult-onset form of the disease, with major neurodevelopmental impact. |
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Childhood-onset spasticity with hyperglycinemia is a rare neurometabolic disease characterized by a childhood onset of progressive spastic ataxia associated with gait disturbances, hyperreflexia, extensor plantar responses and non-ketotic hyperglycinemia typically revealed by biochemical analysis. Additional signs of upper extremity spasticity, dysarthria, learning difficulties, poor concentration, nystagmus, optic atrophy and reduced visual acuity may also be associated. |
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A rare X-linked syndromic intellectual disability characterized by intellectual disability of variable degree, behavioral anomalies (including autism, mood disorders, obsessive-compulsive behavior, and hetero- and auto-aggression), and epilepsy. Progressive neurological symptoms like movement disorders and spasticity, as well as subtle dysmorphic features have also been reported. Heterozygous females may be as severely affected as males. |
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A rare genetic neurodegenerative disease with characteristics of childhood-onset severe developmental delay with regression, poor motor development, speech impairment and hypotonia due to CLCN6 mutations. Most of the patients have vision abnormalities, respiratory system abnormalities (including chronic respiratory insufficiency and tracheostomy that may lead to ventilator dependency) and feeding difficulties (percutaneous endoscopic gastronomy). Skin abnormalities including hyperhidrosis can be present. |
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An extremely rare syndrome characterized by radial ray hypoplasia, choanal atresia and convergent strabismus. It has been reported in a father and his two daughters. The radial ray involvement varies from absent radius, first metacarpal and thumb to hypoplastic thumb or triphalangeal thumb. The condition is most probably hereditary, transmitted as an autosomal dominant trait. |
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A rare genetic multiple congenital anomalies/dysmorphic syndrome characterized by choanal atresia, athelia or hypoplastic nipples, branchial arch abnormalities, external ear malformations, hearing loss, thyroid abnormalities, delayed or absent pubertal development, and short stature. Developmental delay/intellectual disability are variably reported. |
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A rare multiple congenital anomaly syndrome characterized by bilateral choanal atresia associated with characteristic cranio-facial dysmorphism (hypertelorism with narrow palpebral fissures, coloboma of inferior eyelid with presence of eyelashes medial to the defect, prominent nasal bridge, thin lips, prominent ears), that can be accompanied by hearing loss, unilateral cleft lip, preauricular tags, cardiac septal defects and anomalies of the kidneys. Affected individuals have normal intelligence. |
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A rare multiple congenital malformation syndrome, characterized by an association of cleft lip and palate, patchy pigmentary retinopathy (cat's paw), obstructive liver disease (cholestasis, portal hypertension etc.) and obstructive renal disease (ectopic ureteric insertion, obstruction, vesicoureteral reflux and hydronephrosis). Gastrointestinal tract involvement (malrotation, gastroesophageal reflux etc.) and cardiac involvement (coarctation of aorta, pulmonary artery stenosis, etc.) have also been reported. An overlap with Kabuki syndrome is debated. |
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Chondrodysplasia punctata, Toriello type is a rare, non-rhizomelic, primary bone dysplasia syndrome characterized by calcific stippling of epiphyses in association with minor facial abnormalities, short stature and ocular colobomata. In addition, patients present chondrodysplasia punctata, brachycephaly, flat facial profile with small nose, flat lower eyelids and low-set ears, developmental delay, brachytelephalangy and deep palmar creases. Complex congenital cardiac disease and central nervous system anomalies (including partial absence of corpus callosum, small vermis, enlargement of the cisterna magna and/or of the anterior horns of the lateral ventricles) have been reported. |
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A rare genodermatosis disease with great phenotypic variation and characterised most commonly by ichthyosis following the lines of Blaschko, chondrodysplasia punctata (CDP), asymmetric shortening of the limbs, cataracts and short stature. |
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A rare disorder of sex development affecting 46,XY individuals and characterized by complete gonadal dysgenesis (normal external female genitalia, lack of pubertal development, primary amenorrhea, and hypergonadotrophic hypogonadism) in association with severe dwarfism with generalized chondrodysplasia (bell-shaped thorax, micromelia, brachydactyly). Other reported features in the live sibling included eye anomalies (hypoplastic irides, myopia, coloboma of optic discs), dysmorphic features (deep-set eyes, upslanting palpebral fissures, puffy eyelids, large ears and mouth, mild prognathism), muscular hypoplasia, mild intellectual deficiency and severe microcephaly with cerebellar vermis hypoplasia. |
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A rare, genetic, primary bone dysplasia characterized by prenatal onset of disproportionate short stature, shortening of the limbs, congenital joint dislocations, micrognathia, posterior cleft palate, brachydactyly, short metacarpals and irregular size of the metacarpal epiphyses, supernumerary carpal ossification centers and dysmorphic facial features. In addition, hearing impairment and mild psychomotor delay have also been reported. |
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A rare primary bone dysplasia characterized by the association of spondylometaphyseal dysplasia, generalized joint laxity, and dentinogenesis imperfecta. Main skeletal abnormalities comprise short stature, narrow chest, scoliosis, mesomelic limb shortening, and brachydactyly. Radiographic features include severe metaphyseal irregularities of the tubular bones, platyspondyly with coronal clefts, cone-shaped epiphyses of the hands, square iliac wings, and coxa valga. Additional extraskeletal manifestations like pulmonary hypoplasia, cystic renal disease, and non-obstructive hydrocephalus have also been reported. |
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Chondroectodermal dysplasia with night blindness is a rare genetic bone development disorder characterized by proportionate short stature, nail dysplasia (enlarged, convex, hypertrophic nails), hypodontia and night blindness. Osteopenia, a tendency to present fractures, talipes varus with abnormal gait, ear infections, and watering eyes due to narrow tear ducts are frequently associated. Radiologically patients present delayed bone age on wrist X-rays, platyspondyly, and broad metaphyses of humeri with dense and thickened growth plates. |
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Chordoid glioma is an extremely rare glial neoplasm occurring in the region of the anterior third ventricle or hypothalamus, which is non-infiltrative and well-circumscribed and presents most frequently in middle-aged women with symptoms of memory loss and headaches and, because of its location, has a poor prognosis due to surgical morbidity. |
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Brain-lung-thyroid syndrome is a rare disorder characterized by congenital hypothyroidism (CH), infant respiratory distress syndrome (IRDS) and benign hereditary chorea. |
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A rare ectodermal dysplasia syndrome, characterized by the association of choroidal atrophy (sometimes regional), together with other ectodermal dysplasia features including fine and sparse hair, absent or decreased lashes and eyebrows, and possibly mild visual loss and dysplastic/thick/grooved nails. |
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An X-linked retinal dystrophy characterized by choroideremia, causing in affected males progressive nyctalopia and eventual central blindness. Obesity, moderate intellectual disability and congenital mixed (sensorineural and conductive) deafness are also observed. Female carriers show typical retinal changes indicative of the choroideremia carrier state. |
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A rare multiple congenital anomalies/dysmorphic syndrome with characteristics of developmental delay, speech delay and variable degree of intellectual disability (mostly mid-to-moderate but some patients may also have normal intelligence) due to CHD4 gene mutations. Even though clinical manifestations are significantly variable among patients, most patients manifest dysmorphic facial features (could sometimes include macrocephaly), congenital heart defects, hypotonia and ophthalmologic abnormalities. Other clinical features may include brain structure anomalies, skeletal anomalies, hearing impairment and gonadal abnormalities. |
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A rare multiple congenital anomalies/dysmorphic syndrome with characteristics of mild to moderate intellectual disability, autism spectrum phenotype, macrocephaly, tall stature, gastrointestinal problems (including recurrent constipation), distinctive facial features (including wide-set eyes with down-slanted palpebral fissure, broad nose with full nasal tip, pointed chin and broad forehead with prominent supraorbital ridge) and sleep problems. Other clinical manifestations include anxiety problems, attention problems, impaired social interactions, and seizures. |
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A rare, genetic, multiple congenital anomalies/dysmorphic syndrome characterized by moderate to severe intellectual disability, developmental delay, macrocephaly, speech delay, and hypotonia. Dysmorphic facial features include a high, broad, and/or prominent forehead, laterally sparse eyebrows, widely spaced and deeply-set eyes, narrow palpebral fissures, low-set ears, full/prominent cheeks, midface hypoplasia, thin upper lip, and a pointed chin. Additional variable manifestations include joint laxity, abnormality of vision (including hypermetropia, strabismus, and cerebral visual impairment), genital abnormalities in males, and inguinal, umbilical, or hiatal hernia. |
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A rare partial autosomal monosomy characterised by global developmental delay, intellectual disability, multiple cartilaginous exostoses, and craniofacial anomalies (such as brachycephaly, biparietal foramina, large fontanels, craniosynostosis, ptosis, epicanthic folds, prominent nasal bridge with broad, depressed nasal tip, hypoplastic nares, short philtrum, downturned upper lip, and micrognathia). Additional reported features include behavioural abnormalities, myopia, strabismus, and sensorineural hearing loss, among others. |
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A rare genetic disorder characterized by the association of complete or partial congenital aniridia (and associated eyes abnormalities), genitourinary anomalies (ranging from sexual ambiguity to ectopic testis), variable degrees of intellectual disability and an increased risk of developing Wilms tumors. A minority of patients develop kidney failure. Other variable findings may include obesity and duplicated halluces. |
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3q29 microduplications are recently described chromosomal abnormalities with unclear clinical significance. |
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X-linked intellectual disability-retinitis pigmentosa syndrome is characterized by moderate intellectual deficit and severe, early-onset retinitis pigmentosa. It has been described in five males spanning three generations of one family. Some patients also had microcephaly. It is transmitted as an X-linked recessive trait. |
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Xp22.3 microdeletion syndrome is a microdeletion syndrome resulting from a partial deletion of the chromosome X. Phenotype is highly variable (depending on length of deletion), but is mainly characterized by X linked ichthyosis, mild-moderate intellectual deficit, Kallmann syndrome, short stature, chondrodysplasia punctata and ocular albinism. Epilepsy, attention deficit-hyperactivity disorder, autism and difficulties with social communication can be associated. |
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Xq27.3q28 duplication syndrome is a recently described syndrome characterized by short stature, hypogonadism, developmental delay and facial dysmorphism. |
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Chronic Epstein-Barr virus infection syndrome is a rare infectious disease characterized by familial, primary, chronic Epstein-Barr virus infection which typically manifests with persistent mononucleosis-like signs and symptoms, in the absence of secondary immunodeficiency. |
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A rare chronic immune-mediated polyneuropathy characterized by a progressive disabling neuropathy with marked gait disturbance primarily due to sensory ataxia with concurrent cranial neuropathies (internal or external ophthalmoplegia, dysphagia, dysarthria, or facial weakness) and anti-disialosyl IgM antibodies. |
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A rare genetic disease characterized by co-occurrence of sick sinus syndrome (manifesting as sinus bradycardia, often requiring pacemaker implantation) and chronic intestinal pseudo-obstruction (which may be of myogenic or neurogenic origin and usually requires total parenteral nutrition), with an age of onset within the first four decades of life. Other cardiac features, such as atrial flutter or fibrillation and valve anomalies, may also be present. |
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A rare intestinal disease characterized by impaired absorption of starch and short polymers of glucose due to primary small intestinal glucoamylase deficiency. Patients present in infancy or early childhood with chronic diarrhea, abdominal distention, and bloating. Levels of pancreatic amylase are typically normal, and histopathological analysis shows normal morphology of the intestinal mucosa. |
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Chronic diarrhea with villous atrophy is a rare, genetic gastroenterological disease characterized by the early onset of chronic diarrhea, vomiting, anorexia, lactic acidosis, renal insufficiency and hepatic involvement (mild elevation of liver enzymes, steatosis, hepatomegaly). Partial villous atrophy (with eosinophilic infiltration) is observed on intestinal biopsy. Although diarrhea may resolve, the development of neurologic symptoms (cerebellar ataxia, sensorineural deafness, seizures), retinitis pigmentosa and muscle weakness may complicate disease course and lead to death. There have been no further descriptions in the literature since 1994. |
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A rare genetic gastroenterological disease characterised by the presence of multiple persistent, intractable ulcers of the small intestine, leading to chronic blood and protein loss. Signs and symptoms include abdominal pain, anaemia, fatigue, oedema, and diarrhoea. Morphologically, the condition manifests with multiple sharply demarcated shallow lesions with irregular circular or linear shape. |
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Chronic intestinal failure (CIF) is a chronic type of intestinal failure characterized by a nonfunctioning small bowel (that may be reversible or irreversible) where the body is unable to maintain energy and nutritional needs through absorption of food or nutrients via the intestinal tract (despite being metabolically stable) and which therefore necessitates long-term parenteral feeding. CIF may be the result of congenital digestive diseases (such as gastroschisis, atresia of small intestine), short bowel syndrome, intra-abdominal or pelvic cancer, or progressive and devastating gastrointestinal or systemic benign diseases (such as Crohn disease). |
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Chronic hiccup is a rare movement disorder characterized by involuntary spasmodic contractions of the inspiratory muscles synchronized with larynx closure lasting for more than 48 hours. |
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A rare, genetic, intestinal disease characterized by early-onset, chronic diarrhea and intestinal inflammation due to overactivity of guanylate cyclase 2C. Additional manifestations include meteorism, dehydration, metabolic acidosis and electrolyte disturbances. Intestinal dysmotility, small-bowel obstruction and esophagitis (with or without esophageal hernia), as well as irritable bowel syndrome (without severe abdominal pain) and Crohn's disease, are frequently associated. |
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A rare disorder related to pregnancy with characteristics of placental inflammatory process with clusters of histiocytes and associated fibrin in intervillous spaces, resulting in adverse pregnancy outcomes including intrauterine growth restriction, preterm birth, and pregnancy loss. Higher grading according to the proportion of involved intervillous space has been associated with poorer outcomes. There is a significant risk of recurrence in subsequent pregnancies. |
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CLIPPERS is a rare neuroinflammatory disorder characterized by brainstem-predominant encephalomyelitis which typically presents with cerebellar and cranial nerve manifestations (gait ataxia, dysarthria, visual disorders, parasthesias), as well as brainstem, myelopathy and cognitive findings, that respond to steroid treatment. Punctate curvilinear post-gadolinium contrast enhancement predominantly in the pons and cerebellum is observed on brain MRI and prominent, perivascular, CD3+ T-cell predominantly lymphocytic inflammation in neuropathology. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
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A rare acid sphingomyelinase deficiency characterized by mild to massive hepatosplenomegaly, hypersplenism leading to thrombocytopenia, interstitial lung disease, dyslipidemia and central nervous system manifestations (including developmental delay, intellectual disability and ataxia). Some affected individuals may present with coarse facial features. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
Chronic nonbacterial osteomyelitis (CNO), also known as chronic recurrent multifocal osteomyelitis (CRMO), is a chronic autoinflammatory syndrome that is characterised by multiple foci of painful swelling of bones, mainly in the metaphyses of the long bones, in addition to the pelvis, the shoulder girdle and the spine. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
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Majeed syndrome is a rare genetic multisystemic disorder characterised by chronic recurrent multifocal osteomyelitis, congenital dyserythropoietic anaemia, which may be accompanied by neutrophilic dermatosis. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A rare inflammatory optic neuropathy characterized by severe and persistent pain followed by subacute visual loss, a relapsing-remitting course, and steroid-dependence. Involvement of both optic nerves is common and is usually sequential. Serum antibodies against aquaporin 4 are absent in most cases. Magnetic resonance imaging shows contrast enhancement of the acutely inflamed optic nerves. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
Chronic respiratory distress with surfactant metabolism deficiency is a rare, genetic, primary interstitial lung disease with a highly variable clinical presentation, ranging from neonatal respiratory distress syndrome to mild to severe interstitial lung disease (typical symptoms include cough, tachypnea, hypoxia, clubbing, crackles, failure to thrive). Lung biopsy reveals diffuse alveolar damage, interstitial thickening with inflammatory infiltrates, fibroblast proliferation, collagen deposition, and multiple foci of fibrosis, alveolar type II cell hyperplasia, abundant foamy alveolar macrophages and granular lipoproteic material in the alveolar lumen. Imaging shows cystic spaces and ground-glass opacities that are typically homogenously diffuse. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
Chudley-McCullough syndrome is a rare, genetic, syndromic deafness characterized by severe to profound, bilateral, sensorineural hearing loss (congenital or rapidly progressive in infancy) associated with a complex brain malformation including hydrocephalus, varying degrees of partial corpus callosum agenesis, colpocephaly, cerebral and cerebellar cortical dysplasia (bilateral medial frontal polymicrogyria, bilateral frontal subcortical heterotopia) and, in some, arachnoid cysts. Major physical abnormalities or psychomotor delay are usually not associated. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
Chuvash erythrocytosis is a rare, genetic, congenital secondary polycythemia disorder characterized by increased hemoglobin, hematocrit and erythropoietin serum levels and normal oxygen affinity, which usually manifests with headache, dizziness, dyspnea and/or plethora. Patients present an increased risk of hemorrhage, thrombosis and early death. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
Chylomicron retention disease (CRD) is a type of familial hypocholesterolemia characterized by malnutrition, failure to thrive, growth failure, vitamin E deficiency and hepatic, neurologic and ophthalmologic complications. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
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Citrullinemia type I is a rare autosomal recessive urea cycle defect characterized biologically by hyperammonemia and clinically by progressive lethargy, poor feeding and vomiting in the neonatal form and by variable hyperammonemia in the later-onset form. |
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A severe subtype of citrin deficiency characterized clinically by adult onset (20 and 50 years of age), recurrent episodes of hyperammonemia and associated neuropsychiatric symptoms such as nocturnal delirium, confusion, restlessness, disorientation, drowsiness, memory loss, abnormal behavior (aggression, irritability, and hyperactivity), seizures, and coma. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A rare genetic multiple congenital anomalies/dysmorphic syndrome characterized by intellectual disability, obesity, macrocephaly, behavioral abnormalities (such as aggressive tantrums and autistic-like behavior), and delayed speech development. Dysmorphic facial features include large, square forehead, prominent supraorbital ridges, broad nasal tip, large ears, prominent lower lip, and minor dental anomalies such as small upper lateral incisors and central incisor gap. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A form of congenital adrenal hyperplasia (CAH) characterized by simple virilizing or salt wasting forms that can manifest with abnormal genital development with variable levels of virilization in females and with adrenal insufficiency in both sexes, and that presents with dehydration and hypoglycemia (which can be lethal if left untreated) in the neonatal period, as well as hyperandrogenism. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
Classical mycosis fungoides is the most common type of mycosis fungoides, a form of cutaneous T-cell lymphoma, and is characterized by slow progression from patches to more infiltrated plaques and eventually to tumors. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A form of Ehlers-Danlos syndrome characterized by generalized joint hypermobility, skin hyperextensibility and easy bruising without atrophic scarring. Other common features include foot and hand deformities (piezogenic papules, pes planus, broad forefeet, brachydactyly, fragile and thin hand skin breaks or bruises easily), severe fatigue and neuromuscular symptoms including muscle weakness and myalgia. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A rare systemic disease characterized by generalized joint hypermobility with recurrent joint dislocations, redundant and hyperextensible skin with poor wound healing and abnormal scarring, easy bruising, and osteopenia/osteoporosis. Additional manifestations include hypotonia, delayed motor development, foot deformities, prominent superficial veins in the chest region, vascular complications (like mitral valve prolapse and aortic root dilation), hernias, dental anomalies, scoliosis, and facial dysmorphisms (like high palate, micrognathia, narrow palate). Mode of inheritance is autosomal recessive. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
Clear cell papillary renal cell carcinoma is a rare, indolent subtype of clear cell renal carcinoma, arising from epithelial cells in the renal cortex. It most frequently manifests with a well-circumscribed, well-encapsulated, unicentric, unilateral, small tumour that typically does not metastasize. Clinically it can present with flank or abdominal pain or haematuria, although most patients are usually asymptomatic at the time of diagnosis. Bilateral and/or multifocal presentation should raise the suspicion of von Hippel-Lindau syndrome. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
Zlotogora-Ogur syndrome is an ectodermal dysplasia syndrome characterized by hair, skin and teeth anomalies, facial dysmorphism with cleft lip and palate, cutaneous syndactyly and, in some cases, intellectual disability. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A rare multiple congenital anomaly syndrome characterized by flat face, hypertelorism, flat occiput, upward slanting palpebral fissures, cleft palate, micrognathia, short neck, and severe congenital heart defects. Malrotation of the intestine, bilateral clinodactyly, bilobed tongue, short fourth metatarsals and bifid thumbs may be additionally observed. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A rare genetic multiple congenital anomalies/dysmorphic syndrome without intellectual disability characterized by unilateral or bilateral cleft lip and palate and craniofacial dysmorphism (including frontal bossing, hypertelorism, broad flat nasal bridge, cupped ears/thickened helices, and micrognathia). Additional manifestations are variable congenital cardiac anomalies, pectus excavatum, abnormalities of the hands and feet, ocular abnormalities (myopia, cataract, staphyloma), and conductive or sensorineural hearing loss. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
An exceedingly rare association characterized by cleft lip and progressive retinopathy. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
Cleft lip/palate-deafness-sacral lipoma syndrome is characterized by cleft lip/palate, profound sensorineural deafness, and a sacral lipoma. It has been described in two brothers of Chinese origin born to non-consanguineous parents. Additional findings included appendages on the heel and thigh, or anterior sacral meningocele and dislocated hip. The mode of inheritance is probably autosomal or X-linked recessive. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
An orofacial clefting syndrome that is characterized by a cleft palate, ocular coloboma, hypospadias, mixed conductive-sensorineural hearing loss, short stature, and radio-ulnar synostosis. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A rare, genetic, multiple congenital anomalies syndrome characterized by the association of cleft palate, peculiar facies (asymmetrical appearance, inner epicanthal folds, short nose, anteverted nostrils, low and back-oriented ears, thin upper lip and micrognathism), short stature, short neck, vertebral anomalies and intellectual disability. There have been no further descriptions in the literature since 1993. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A rare congenital malformation syndrome characterized by cleft soft palate, severe oligodontia of the deciduous teeth, absence of the permanent dentition, bilateral conductive deafness due to fixation of the footplate of the stapes, short halluces with a wide space between the first and second toes, and fusion of carpal and tarsal bones. There have been no further descriptions in the literature since 1971. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A rare genetic multiple congenital anomalies/dysmorphic syndrome with characteristics of congenital heart defect (including atrial or ventricular septal defects and aortic coarctation), cleft palate, and variable degree of developmental delay and intellectual disability. Most patients reported to also have autism spectrum disorder. Overlapping facial features were reported in some patients including broad forehead with high anterior hairline, finely arched eyebrows, short philtrum, thin or tented upper lip. Other clinical features may involve mild distal skeletal abnormalities, hypotonia, hearing loss, feeding problems and skin abnormalities. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
Cleft palate-large ears-small head syndrome is a rare, genetic syndrome characterized by cleft palate, large protruding ears, microcephaly and short stature (prenatal onset). Other skeletal abnormalities (delayed bone age, distally tapering fingers, hypoplastic distal phalanges, proximally placed thumbs, fifth finger clinodactyly), Pierre Robin sequence, cystic renal dysplasia, proximal renal tubular acidosis, hypospadias, cerebral anomalies on imaging (enlargement of lateral ventricles, mild cortical atrophy), seizures, hypotonia and developmental delay are also observed. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
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Cleidorhizomelic syndrome is a rhizo-mesomelic dysplasia characterized by rhizomelic short stature/dwarfism in combination with lateral clavicular defects. Additional manifestations include brachydactyly with bilateral clinodactyly and hypoplastic middle phalanx of the fifth digit. X-ray demonstrated an apparent Y-shaped or bifid distal clavicle. Cleidorhizomelic syndrome has been reported in one family (mother and son) and is suspected to be transmitted in an autosomal dominant manner. There have been no further descriptions in the literature since 1988. |
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This newly described syndrome is characterized by cloverleaf skull, limb anomalies, facial dysmorphism and multiple congenital anomalies. |
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Inserm Orphanet |
A rare syndromic craniosynostosis characterized by prenatal presentation with cloverleaf skull, micromelia and asphyxiating thoracic dysplasia. Radiologic features include short ribs, horizontal roof of the acetabulum with a rounded median prominence and lateral spurs, deformed long bones with broad metaphyses, and absent ossification of the terminal phalanges. There have been no further descriptions in the literature since 1987. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
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A rare genetic autoinflammatory syndrome with skin involvement characterised by cold-induced urticarial rash without angioedema starting in infancy and systemic inflammation due to autosomal dominant mutations in the coagulation factor 12 (F-12) gene. In addition to cold-induced, non-pruritic urticarial rash, patients present with headache, mild to severe arthralgia, fatigue, subfebrile evening temperature, chills, and malaise. Systemic symptoms worsen during the cold season and over the years. |
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A rare, genetic, cobblestone lissencephaly disease characterized by the presence of a constellation of brain malformations, including cortical gyral and sulcus anomalies, white matter signal abnormalities, cerebellar dysplasia and brainstem hypoplasia, existing alone or in conjunction with minimal muscular and ocular abnormalities, typically manifesting with severe developmental delay, increased head circumference, hydrocephalus and seizures. |
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Cochleosaccular degeneration-cataract syndrome is characterized by progressive sensorineural hearing loss due to severe cochleosaccular degeneration and cataract. So far, it has been reported in two families. Transmission is autosomal dominant. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
COASY protein-associated neurodegeneration (CoPAN) is a very rare, slowly progressive form of neurodegeneration with brain iron accumulation (NBIA) characterized by classic NBIA features. The clinical manifestations include early-onset spastic-dystonic paraparesis, oromandibular dystonia, dysarthria, parkinsonism, axonal neuropathy, progressive cognitive impairment, complex motor tics, and obsessive-compulsive disorder. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A rare X-linked syndromic intellectual disability characterized by global development delay, postnatal growth retardation leading to short stature, facial dysmorphism, short hands with tapering fingers and progressive skeletal abnormalities including kyphoscoliosis and pectus carinatum/excavatum. Intellectual disability ranges from mild to severe. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A rare genetic multiple congenital anomalies/dysmorphic syndrome characterized by global developmental delay, intellectual disability, short stature, skeletal abnormalities (such as brachydactyly and vertebral anomalies), obesity, cardiac, respiratory, and genitourinary anomalies, and dysmorphic facial features (including coarse facies, thick eyebrows, synophrys, hypertelorism, short, upturned nose, and long philtrum). Additional reported manifestations are microcephaly, hearing impairment, cataract, and gastroesophageal reflux. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |
A rare congenital disorder of glycosylation characterized by infantile onset of hepatosplenomegaly, progressive liver failure, hypotonia, and global developmental delay. Mild dysmorphic features and seizures have also been reported. Laboratory abnormalities include elevated liver enzymes, mild hypercholesterolemia, and low serum ceruloplasmin. |
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Attributed to a particular organization or group that contributes content to SNOMED CT. |
Inserm Orphanet |