| Inbound Relationships |
Type |
Active |
Source |
Characteristic |
Refinability |
Group |
| A rare genetic syndrome characterized by skeletal anomalies, including short stature, ridging of the metopic suture, a fusion of cervical vertebrae, thoracic hemivertebrae, scoliosis, sacral hypoplasia, short middle phalanges. Patients also had a moderate intellectual disability and abducens palsies. Glucose intolerance and imperforate anus were also described. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| A rare, multiple congenital anomalies/dysmorphic syndrome characterized by microcephaly, intellectual disability, seizures, and congenital heart defects (e.g. atrial/ventricular septal defect, hypoplastic aortic arch with persistent ductus arteriosus). Additional manifestations include mild hypothyroidism, skeletal abnormalities, micropenis, delayed psychomotor development, dysmorphic facial features (including epicanthus, depressed nasal bridge, prominent antitragus), and pulmonary vascular occlusive disease. There have been no further descriptions in the literature since 1989. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| A rare, complex chromosomal duplication/inversion in the region 15q11.2-q13.1 characterized by early central hypotonia, global developmental delay and intellectual deficit, autistic behavior, and seizures. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| A very rare syndrome characterized by intellectual deficit, horseshoe kidney, and congenital heart defects. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| Fallot complex - intellectual deficit - growth delay is a rare disorder characterized by tetralogy of Fallot, minor facial anomalies, and severe intellectual deficiency and growth delay. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
6 |
| A rare ectodermal dysplasia syndrome characterized by hypotrichosis of scalp and eyebrows, finger syndactyly, intellectual disability and early eruption of teeth. Facial dysmorphism (i.e. round face with prominent forehead, cheeks and ears, and upward-slanting palpebral fissures), hypoplasia of median and distal phalanges, and kyphosis are additionally observed features. There have been no further descriptions in the literature since 1996. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| Microbrachycephaly-ptosis-cleft lip syndrome is characterized by the association of intellectual deficit, microbrachycephaly, hypotelorism, palpebral ptosis, a thin/long face, cleft lip, and anomalies of the lumbar vertebra, sacrum and pelvis. It has been described in two Brazilian sisters. Transmission appears to be autosomal recessive. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare, fatal multiple congenital anomalies/dysmorphic syndrome characterized by facial dysmorphism (including dolichocephaly/scaphocephaly, high frontal hairline, laterally overlapping upper eyelids, hypertelorism, prominent eyelashes, deep-set eyes, macrocornea, nystagmus, dysplastic ears, abnormal auricles, prominent nasal bridge, dental dysplasia), visual impairment, deafness, seizures, generalized skeletal dysplasia, high fingerprint ridge count, cryptorchidism, hypospadias, spasticity and severe intellectual disability. An increased chromosome breakage and a fatal lymphoid malignancy have been reported. There has been no further description in the literature since 1974. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| A rare subtype of autosomal dominant cerebellar ataxia type 1 (ADCA type 1) characterized by the onset in infancy of cerebellar ataxia, neonatal hypotonia (in some), mild developmental delay and, in later life, intellectual disability. Less common features include dysarthria, dysmetria and dysmorphic facial features (long face, bulbous nose long philtrum, thick lower lip and pointed chin). |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare X-linked disorder of purine metabolism associated with hyperuricemia and hyperuricosuria and comprised of two forms: an early-onset severe form characterized by gout, urolithiasis, and neurodevelopmental anomalies and a mild late-onset form with no neurologic involvement. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| Ramos-Arroyo syndrome (RAS) is a very rare genetic disorder characterized by corneal anesthesia, retinal abnormalities, bilateral hearing loss, distinct facies, patent ductus arteriosus, Hirschsprung disease, short stature, and intellectual disability. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare, genetic, syndromic intellectual disability disorder characterized by the association of nonprogressive spastic quadriparesis, retinitis pigmentosa, intellectual disability, and variable deafness. There have been no further descriptions in the literature since 1976. |
Interprets |
False |
Intellectual ability |
Inferred relationship |
Some |
5 |
| Severe intellectual disability-epilepsy-anal anomalies-distal phalangeal hypoplasia is characterized by severe intellectual deficit, epilepsy, hypoplasia of the terminal phalanges, and an anteriorly displaced anus. It has been described in two sisters born to consanguineous parents. The syndrome is transmitted as an autosomal recessive trait and appears to be caused by anomalies in two chromosome regions, one localized to chromosome 1 and the other to chromosome 14. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare inborn error of metabolism characterized by infantile onset of global developmental delay, severe intellectual disability, seizures, and movement disorder (including tremor, hyperkinesia, and myoclonus), associated with excessive excretion of hydroxylysine in urine. There have been no further descriptions in the literature since 1970. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| A rare syndromic retinitis pigmentosa characterized by pigmentary retinopathy, diabetes mellitus with hyperinsulinism, acanthosis nigricans, secondary cataracts, neurogenic deafness, short stature mild hypogonadism in males and polycystic ovaries with oligomenorrhea in females. Inheritance is thought to be autosomal recessive. It can be distinguished from Alstrom syndrome by the presence of intellectual disability and the absence of renal insufficiency. There have been no further descriptions in the literature since 1993. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
6 |
| A rare, multisystemic inherited metabolic disease characterized clinically, by a variable spectrum of severity, primarily comprised of psychomotor delay, myopathy and liver dysfunction. Most patients present in infancy, but the onset can be already in utero or in adult age. Hypermethioninemia is frequent, but often absent in infancy. Creatine kinase is elevated in most patients. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| MOMO syndrome is a very rare genetic overgrowth/obesity syndrome characterized by macrocephaly, obesity, mental (intellectual) disability and ocular abnormalities. Other frequent clinical signs include macrosomia, downslanting palpebral fissures, hypertelorism, broad nasal root, high and broad forehead and delay in bone maturation, in association with normal thyroid function and karyotype. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| A rare X-linked syndromic intellectual disability characterized by congenital and permanent vocal cord paralysis causing severe congenital laryngeal stridor, associated with intellectual disability in male patients. Other presenting symptoms may include weak cry, cough, cyanosis, neonatal asphyxia, feeding difficulty, aspiration, and bronchiectasis. Microcephaly, tone abnormalities, visual and hearing impairment may also be associated features. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare genetic, intellectual disability syndrome characterized by intellectual disability, childhood hypotonia, severe expressive speech delay, autism spectrum disorder, and a distinctive facial appearance with a spectrum of additional clinical features. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| A rare syndromic intellectual disability characterized by severe intellectual disability and calcification of the choroid plexus, associated with elevated cerebrospinal fluid protein concentration. Additional signs and symptoms include strabismus, increased deep tendon reflexes, and foot deformities, among others. There have been no further descriptions in the literature since 1993. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare, genetic, multiple congenital anomalies syndrome defined by global developmental delay and severe intellectual disability, epilepsy, hypoplasia/aplasia of the nails of the thumb and great toe, and facial dysmorphism. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare ARX-related epileptic encephalopathy characterized by infantile onset of myoclonic epilepsy with generalized spasticity, severe global developmental delay, and moderate to profound intellectual disability. Obligate female carriers show subtle, generalized hyperreflexia. Late onset progressive spastic ataxia has also been reported. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| A rare and severe inborn metabolic disease characterized clinically by the association of severe-to-profound neurodevelopmental impairment, severe visual impairment, ante-postnatal growth impairment, severe scoliosis and, frequently, early-onset epilepsy. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare X-linked syndromic intellectual disability characterized by intellectual deficit, microcephaly, short stature, and ectodermal anomalies (including alopecia, spontaneous formation of bullae without evident trauma, hyper- or hypopigmented maculae, acrocyanosis, and dystrophic nails) in male patients. Additional reported features are short, tapering fingers, ocular anomalies (such as corneal opacities and cataract), and hypogenitalism. There have been no further descriptions in the literature since 1995. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| Intellectual disability, Buenos-Aires type is a rare intellectual disability syndrome characterized by growth retardation, microcephaly, characteristic facial features (including narrow forehead, bushy eyebrows, hypertelorism, small, downward-slanting palpebral fissures with blepharoptosis, malformed and low-set ears, broad straight nose, thin upper lip, and a wide, tented mouth), developmental delay, intellectual disability, speech disorder, and multiple organ malformations (e.g. ventricular septal defect, megaloureter, dilated renal pelvis). Additional manifestations reported include neurocutaneous lesions (including palmoplantar hyperkeratosis), internal hydrocephalus, and bilateral partial soft-tissue syndactyly of second and third toe. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| Neurofaciodigitorenal syndrome is a rare multiple developmental anomalies syndrome characterized by neurological abnormalities (including megalencephaly, hypotonia, intellectual disability, abnormal EEG), dysmorphic facial features (high prominent forehead, grooved nasal tip, ptosis, ear anomalies) and acrorenal defects (such as triphalangism, broad halluces, unilateral renal agenesis). Additionally, intrauterine growth restriction, short stature and congenital heart defects may be associated. There have been no further descriptions in the literature since 1997. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A disorder that is characterized by the association of a non-progressive congenital ataxia, severe intellectual deficit, optic atrophy and structural anomalies of the skin vessels. It has been described in five children from a large consanguineous Lebanese family. Short stature and microcephaly were also reported. Transmission is autosomal recessive. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| Caudal appendage-deafness syndrome is characterized by caudal appendage, short terminal phalanges, deafness, cryptorchidism, intellectual deficit, short stature and dysmorphism. It has been described in monozygotic twin boys. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
7 |
| A rare genetic neurological disorder characterized by early-onset progressive leukoencephalopathy, severe developmental delay, early-onset or congenital deafness (only few cases reported without hearing loss), and visual impairment. All patients manifest calcifications in brain and spinal cord. Cognitive impairment, seizures, hypotonia, spastic tetraplegia or quadriplegia are observed in the majority of the patients. Variable features may include microcephaly and anemia. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
7 |
| Weaver-Williams syndrome is a multiple congenital anomalies syndrome characterized by moderate-to-severe intellectual disability, decreased muscle mass, microcephaly, facial dysmorphism (prominent ears, midfacial hypoplasia, small mouth and cleft palate), clinodactyly of the fingers, delayed osseous maturation and generalized bone hypoplasia. The syndrome has been described in a brother and sister and an autosomal recessive mode of inheritance has been suggested. There have been no further descriptions in the literature since 1977. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| Pfeiffer-Palm-Teller syndrome is a very rare dysmorphic syndrome described in two siblings and characterised by a short stature, unique facies, enamel hypoplasia, progressive joint stiffness, high-pitched voice, cup-shaped ears, and narrow palpebral fissures with epicanthal folds, and intellectual deficit. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| Intellectual disability-cataracts-calcified pinnae-myopathy syndrome is a rare, genetic intellectual disability syndrome characterized by macrocephaly, hypotonia, dysmorphic facial features (wide forehead, ptosis, downslanting palpebral fissures, enlarged and calcified external ears, large jaw), sparse body hair, tall stature, and intellectual disability. Hearing loss, insulin-resistant diabetes, and progressive distal muscle wasting (leading to joint contractures) have also been reported in adulthood. Rare manifestations include behavioral abnormalities (aggression and restlessness), hypothyroidism, cerebral calcification, ataxia, and peripheral neuropathy. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| X-linked intellectual disability, Hedera type is a rare X-linked intellectual disability syndrome characterized by an onset in infancy of delayed motor and speech milestones, generalized tonic-clonic seizures and drop attacks, and mild to moderate intellectual disability. Additional, less common manifestations include scoliosis, ataxia (resulting in progressive gait disturbance), and bilateral pes planovalgus. Physical appearance is normal with no dysmorphic features reported. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| X-linked intellectual disability, Nascimento type is a rare X-linked intellectual disability syndrome characterized by intellectual disability (with severe speech impairment), a myxedematous appearance, dysmorphic facial features (including large head, synophrys, prominent supraorbital ridges, almond-shaped and deep-set eyes, large ears, wide mouth with everted lower lip and downturned lip corners), low posterior hairline, short, broad neck, marked general hirsutism and abnormal hair whorls, skin changes (e.g. dry skin or hypopigmented spots), widely spaced nipples, obesity, micropenis, onychodystrophy and seizures. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| X-linked intellectual disability-limb spasticity-retinal dystrophy-diabetes insipidus syndrome is a rare genetic neurometabolic disease characterized by severe intellectual disability, spastic quadriparesis, Leber congenital amaurosis and diabetes insipidus. Additional manifestations include facial dysmorphy (dolichocephalic skull, hypertelorism, deep-set eyes, hypoplastic nares, low-set ears), short stature, truncal hypotonia and axial hypertonia. Brain anomalies (e.g. thin corpus callosum with lack of isthmus and tapered splenium, hypoplasia or atrophy of the optic chiasm, prominent lateral ventricles, diminished white matter), described on magnetic resonance imaging, have been reported. High prenatal alpha-fetoprotein and intrauterine growth restriction is observed in routine pregnancy examination. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| A rare, genetic, multiple congenital anomalies/dysmorphic syndrome characterized by congenital, total, cortical blindness, intellectual disability, postaxial polydactyly of the hands and feet, pre- and postnatal growth delay, psychomotor developmental retardation, and mild facial dysmorphism (including prominent forehead, short nose, long philtrum, high-arched palate, and microretrognathia). Recurrent respiratory and intestinal infections, as well as moderate hypertonia and hyperreflexia, are also associated. There have been no further descriptions in the literature since 1985. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| A rare syndrome characterized by sparse hair, osteopenia, intellectual disability, minor facial abnormalities, joint laxity and hypotonia. There have been no further descriptions in the literature since 1992. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| A rare congenital limb malformation characterized the association of hallux varus with short thumbs and first toes (involving the metacarpals, metatarsals, and distal phalanges; the proximal and middle phalanges are of normal length) and abduction of the affected digits. Intellectual deficit was observed in all reported individuals. There have been no further reports since 1994. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| Spastic paraplegia-precocious puberty syndrome is a complex form of hereditary spastic paraplegia characterized by the onset of progressive spastic paraplegia associated with precocious puberty (due to Leydig cell hyperplasia) in childhood (at the age of 2 years). Moderate intellectual disability was also reported. There have been no further descriptions in the literature since 1983. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| A very rare syndrome described in four siblings of one French family and characterized by branchial dysplasia (malar hypoplasia, macrostomia, preauricular tags and meatal atresia), club feet, inguinal herniae and cholestasis due to paucity of interlobular bile ducts and intellectual deficit. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| A rare multiple congenital anomalies/dysmorphic syndrome characterized by global developmental delay, intellectual disability, hypotonia, seizures, microcephaly, delayed bone maturation, and skeletal abnormalities (such as scoliosis or pectus excavatum, among others). Dysmorphic features include coarse face, hirsutism, thick eyebrows, broad nasal septum, short philtrum, large mouth, and prominent ears. There have been no further descriptions in the literature since 1996. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
6 |
| A rare, genetic, epilepsy syndrome characterized by epilepsy, palpebral conjunctival telangiectasias, borderline to moderate intellectual disability, diminished serum IgA levels, shortened fifth fingers and dysmorphic facial features (including frontal hirsutism, synophrys, anteverted nostrils, prominent ears, long philtrum, irregular teeth implantation, micrognathia). No new cases have been described in the literature since 1978. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| Bonnemann-Meinecke-Reich syndrome is a syndrome of multiple congenital anomalies characterized by an encephalopathy which predominantly occurs in the first year of life and presenting as psychomotor delay. Additional features of the disease include moderate dysmorphia, craniosynostosis, dwarfism (due to growth hormone deficiency), intellectual disability, spasticity, ataxia, retinal degeneration, and adrenal and uterine hypoplasia. The disease has been described in only two families, with each family having two affected siblings. An autosomal recessive inheritance has been suggested. There have been no further descriptions in the literature since 1991. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| Dysmorphism-short stature-deafness-disorder of sex development syndrome is characterized by dysmorphism (including facial asymmetry, arched eyebrows, hypertelorism, broad and flat nasal bridge, microtia, small nose with anteverted nostrils, micrognathia), deafness, cleft palate, male pseudohermaphroditism, and growth and psychomotor retardation. It has been described in two siblings. It is transmitted as an autosomal recessive trait. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
6 |
| A rare multiple congenital anomalies/dysmorphic syndrome characterized by intellectual disability, psychomotor retardation, flat face and some features resembling Marfan syndrome, such as tall stature, dolichostenomelia, arm span larger than height, arachnodactyly of hands and feet, little subcutaneous fat, and muscle hypotonia. There have been no further descriptions in the literature since 1984. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| Stimmler syndrome is characterized by the association of microcephaly, low birth weight and severe intellectual deficit with dwarfism, small teeth and diabetes mellitus. Two cases have been described. Biochemical tests reveal the presence of high levels of alanine in the urine and elevated alanine, pyruvate and lactate levels in the blood. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
7 |
| A rare syndromic intellectual deficiency characterized by psychomotor delay, severe progressive spastic quadriplegia, microcephaly, and a Hallermann-Streiff-like phenotype including absence of eyebrows and eyelashes, glaucoma, and small, beaked nose. Structural central nervous system abnormalities (cervical spinal cyst, occipital cranium bifidum occulatum) were additional findings. There have been no further descriptions in the literature since 1974. |
Interprets |
False |
Intellectual ability |
Inferred relationship |
Some |
7 |
| A rare multiple congenital anomalies/dysmorphic syndrome characterized by intellectual disability, growth retardation, unilateral preaxial polydactyly, and colobomatous anomalies (including coloboma of the iris, optic nerve head, choroid, and retina). There have been no further descriptions in the literature since 1987. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| Ichthyosis-intellectual disability-dwarfism-renal impairment syndrome is characterized by nonbullous congenital ichthyosis, intellectual deficit, dwarfism and renal impairment. It has been described in four members of one Iranian family. Transmission is autosomal recessive. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
6 |
| A rare X-linked syndromic intellectual disability characterized by intellectual deficit, choroideremia, horizontal nystagmus, severe myopia, acrokeratosis verruciformis-like skin abnormality, anhidrosis, and scapular winging. There have been no further descriptions in the literature since 1959. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| An extremely rare syndrome reported in two siblings of non-consanguineous parents that is characterized by the association of ocular abnormalities (partial aniridia, congenital glaucoma, telecanthus) with frontal bossing, hypertelorism, unilateral renal agenesis and mild psychomotor delay. There have been no further descriptions in the literature since 1974. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare, genetic, congenital limb malformation syndrome characterized by bilateral thumb ankylosis, type A brachydactyly and mild to moderate intellectual disability. Patients present thumb stiffness and abnormalities of the metacarpal bones, frequently associated with mild facial dysmorphism and signs of obesity. There have been no further descriptions in the literature since 1990. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| C syndrome is a rare multiple congenital anomaly/intellectual disability syndrome characterized by trigonocephaly and metopic suture synostosis, dysmorphic facial features, short neck, skeletal anomalies, and variable intellectual disability. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare, genetic dysostosis malformation syndrome characterized by skeletal dysplasia (rabbit ear-shaped iliac alae, delayed bone age, abnormalities of the vertebral bodies and schisis of the vertebral arches), seizures, short stature, cerebral atrophy and moderate to severe intellectual disability. Additional variable manifestations include corneal and retinal abnormalities, cataract, prognathism, dental malocclusion, brachydactyly, clinodactyly, slight generalized hypotonia and hyper extensible joints. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| McDonough syndrome is a rare, multiple congenital anomalies/dysmorphic syndrome characterized by facial dysmorphism (prominent superciliary arcs, synophrys, strabismus, large, anteverted ears, large nose, malocclusion of teeth), delayed psychomotor development, intellectual disability and congenital heart defects (e.g. pulmonic stenosis, patent ductus arteriosus, atrial septal defect). Additional features include thorax deformation (pectus excavatum/carinatum), kyphoscoliosis, diastasis recti and cryptorchidism. There have been no further descriptions in the literature since 1984. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| A rare genetic syndromic intellectual disability characterized by language delay and mild to moderate intellectual disability associated with truncal obesity, congenital nonprogressive retinal dystrophy with poor night vision and reduced visual acuity, and micropenis in males. Cataracts may occur in the second or third decade of life. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| Cataract-intellectual disability-anal atresia-urinary defects syndrome is characterized by congenital cataracts with squint, intellectual deficit, anomalies of the genitourinary tract (rectovesical fistula, micropenis, undescended testis, and hypospadias), imperforate anus and other anomalies. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| GMS syndrome describes an extremely rare syndrome involving goniodysgenesis, intellectual disability and short stature in addition to microcephaly, short nose, small hands and ears, and that has been seen in one family to date. There have been no further descriptions in the literature since 1992. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare multiple congenital anomalies/dysmorphic syndrome characterized by the association of intellectual deficit, facial dysmorphism (a highly arched palate, pointed chin, and small mouth, hypotelorism, a long nose and large protruding ears), arachnodactyly, hypogenitalism (undescended testes and hypospadias) and failure to thrive. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| A very rare multiple congenital anomalies syndrome described in three brothers of one South-African family, and characterized by hypospadias and intellectual deficit, in association with microcephaly, craniofacial dysmorphism, joint laxity and beaked nails. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare X-linked syndromic intellectual disability characterized by infantile-onset non-progressive intellectual deficit (with psychomotor developmental delay, cognitive impairment and macrocephaly) and early-onset parkinsonism (before 45 years of age), in male patients. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| Microcephaly-deafness-intellectual disability syndrome is characterized by microcephaly, deafness, intellectual deficit and facial dysmorphism (facial asymmetry, prominent glabella, low-set and cup-shaped ears, protruding lower lip, micrognathia). It has been described in a mother and her son. The mode of inheritance is probably autosomal dominant. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
6 |
| An extremely rare genetic syndromic intellectual disability described in less than 20 families to date and characterized by total or partial alopecia associated with intellectual deficit. The syndrome can be associated with other anomalies such as seizures, sensorineural hearing loss, delayed psychomotor development, and/or hypertonia. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare syndromic intellectual disability characterized by intellectual deficit, short stature, obesity, genital abnormalities, and hand and/or toe contractures. The patients also present with generalized osteoporosis and a history of frequent fractures. This syndrome is similar to Prader-Willi syndrome, but the hand contractures and osteoporosis, together with the lack of hypotonia, indicate this is a different entity. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| Female restricted epilepsy with intellectual disability is a rare X-linked epilepsy syndrome characterized by febrile or afebrile seizures (mainly tonic-clonic, but also absence, myoclonic, and atonic) starting in the first years of life and, in most cases, developmental delay and intellectual disability of variable severity. Behavioral disturbances (e.g. autistic features, hyperactivity, and aggressiveness) are also frequently associated. This disease affects exclusively females, with male carriers being unaffected, despite an X-linked inheritance. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare X-linked syndromic intellectual disability characterized by a variable clinical picture including developmental delay, mild to moderate intellectual disability, learning difficulties, communication deficits, and behavioral problems (such as aggression, attention deficit, hyperactivity, and autistic features). Personality disorder and psychotic behavior have also been reported. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| A rare, congenital X-linked developmental disorder characterized by hydrocephalus of varying degrees of severity, intellectual deficit, spasticity of the legs, and adducted thumbs. The syndrome represents a spectrum of disorders including: X-linked hydrocephalus with stenosis of the aqueduct of Sylvius (HSAS), MASA syndrome, X-linked complicated hereditary spastic paraplegia type 1, and X-linked complicated corpus callosum agenesis. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| Trisomy 10p is a syndrome of mental retardation/multiple congenital malformations (MR-MCA) that is caused by the total or partial duplication of the short arm of chromosome 10. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| Microphthalmia-ankyloblepharon-intellectual disability syndrome is characterized by microphthalmia, ankyloblepharon and intellectual deficit. It has been described in seven male patients from two generations of a Northern Ireland family. The causative gene is localized to the Xq27-q28 region. The syndrome is transmitted as an X-linked recessive trait. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A developmental disorder characterized by typical craniofacial features, prenatal and postnatal growth impairment, intellectual disability, severe delayed psychomotor development, seizures, and hypotonia. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare developmental defect during embryogenesis, a contiguous gene deletion syndrome, is a form of alpha-thalassemia characterized by microcytosis, hypochromia, normal hemoglobin (Hb) level or mild anemia, associated with developmental abnormalities. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
6 |
| A rare multiple congenital anomalies/dysmorphic syndrome characterized by severe intellectual deficit, Dandy-Walker malformation, macrocephaly, severe myopia, brachytelephalangy with short and broad fingernails, and dysmorphic facial features (such as thick eyebrows, synophrys, epicanthal folds, low-set ears, short philtrum, and high-arched palate). Additional reported manifestations include seizures and skeletal and genital anomalies, among others. There have been no further descriptions in the literature since 1989. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
1 |
| Metaphyseal dysostosis-intellectual disability-conductive deafness syndrome is characterized by metaphyseal dysplasia, short-limb dwarfism, mild intellectual deficit and conductive hearing loss, associated with repeated episodes of otitis media in childhood. It has been described in three brothers born to consanguineous Sicilian parents. Variable manifestations included hyperopia and strabismus. The mode of inheritance is autosomal recessive. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| Spastic paraplegia-glaucoma-intellectual disability syndrome is characterized by progressive spastic paraplegia, glaucoma and intellectual deficit. It has been described in two families. The second described sibship was born to consanguineous parents. The mode of inheritance is autosomal recessive. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
6 |
| A rare intellectual disability syndrome characterized by intellectual deficit, marfanoid habitus, microcephaly, and glomerulonephritis. There have been no further reports since 1992. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| Megalocornea-intellectual disability syndrome is a rare intellectual disability syndrome most commonly characterized by megalocornea, congenital hypotonia, varying degrees of intellectual disability, psychomotor/developmental delay, seizures, and mild facial dysmorphism (including round face, frontal bossing, epicanthal folds, large low set ears, broad nasal base, anteverted nostrils, and long upper lip). Interfamilial and intrafamilial clinical variability has been reported. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| Ectodermal dysplasia-intellectual disability-central nervous system malformation syndrome is a rare, multiple developmental anomalies syndrome characterized by the triad of ectodermal dysplasia (mostly hypohidrotic with dry skin and reduced sweating and sparse, fair scalp hair, eyebrows and eyelashes), severe intellectual disability and variable central nervous system anomalies (cerebellar hypoplasia, dilatation of ventricles, corpus callosum agenesis, Dandy-Walker malformation). Distinct craniofacial dysmorphism with macrocephaly, frontal bossing, midfacial hypoplasia and high arched or cleft palate, as well as cryptorchidism, feeding difficulties and hypotonia, are associated. There have been no further descriptions in the literature since 1998. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare multiple congenital anomalies syndrome characterised by variable skeletal abnormalities (including craniostenosis, pectus carinatum, short sternum, joint hyperextensibility, and abnormal vertebrae), cutis laxa with excessive skin folds around the cheek, chin and neck, ambiguous genitalia with a micropenis and perineal hypospadia, an umbilical hernia, intellectual disability, premature aged appearance, and cardiac enlargement involving either the ventricles or atria. Facial dysmorphism is variable and can include multiple hair whorls, ptosis, high and broad nasal root, low set ears and small chin. Enamel hypocalcification, abnormal modelling of tubular bones, and reduced cutis laxa may become apparent later on. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
6 |
| A rare, genetic, syndromic dysostosis characterized by bilateral, symmetrical, preaxial brachydactyly associated with hyperphalangy, motor developmental delay and intellectual disability, growth retardation, sensorineural hearing loss, dental abnormalities (including misalignment of teeth, talon cusps, microdontia), and facial dysmorphism that includes plagiocephaly, round face, hypertelorism, malar hypoplasia, malformed ears, microstomia and micro/retrognathia. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
6 |
| A rare, genetic multiple congenital anomalies/dysmorphic syndrome characterized by congenital microcephaly, severe epilepsy with hypsarrhythmia, adducted thumbs, abnormal genitalia, and normal thyroid function. Hypotonia, moderate to severe psychomotor delay, and characteristic facial dysmorphism (including round face with prominent cheeks, blepharophimosis, large, bulbous nose with wide alae nasi, posteriorly rotated ears with dysplastic conchae, narrow mouth, cleft palate, and mild micrognathia) are additional characteristic features. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare complex hereditary spastic paraplegia characterized by an early onset hypotonia that progresses to spasticity, global developmental delay, severe intellectual disability and speech impairment, microcephaly, short stature and dysmorphic features. Patients often become non-ambulatory, and some develop seizures and stereotypic laughter. |
Interprets |
False |
Intellectual ability |
Inferred relationship |
Some |
5 |
| A form of hypotonia-cystinuria type 1 syndrome characterized by mild to moderate intellectual disability in addition to classic hypotonia-cystinuria syndrome phenotype (cystinuria type 1, generalized hypotonia, poor feeding, growth retardation, and minor facial dysmorphism). |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| déficience intellectuelle associée à SYNGAP1 (synaptic Ras GTPase activating protein 1) |
Interprets |
False |
Intellectual ability |
Inferred relationship |
Some |
2 |
| A rare syndromic microphthalmia characterized by bilateral, usually asymmetrical, microphthalmia associated typically with a unilateral coloboma, truncal obesity, borderline to mild intellectual disability, hypogenitalism and, more variably, nystagmus, cataracts and developmental delay. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| A rare, genetic, syndromic intellectual disability disorder characterized by intellectual disability, significant motor delay, severe speech impairment, early-onset truncal hypotonia with progressive distal hypertonia/spasticity, microcephaly, and behavioral anomalies (autistic features, aggression or auto-aggressive behavior, sleep disturbances). Variable facial dysmorphism includes broad nasal tip with small alae nasi, long and/or flat philtrum, thin upper lip vermillion. Visual impairment (strabismus, hyperopia, myopia) is commonly associated. |
Interprets |
False |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare, syndromic intellectual disability characterized by intellectual disability of various severity, hypotonia, feeding difficulties, dysmorphic features, autism and behavioral issues. Growth retardation, congenital heart anomalies, gastrointestinal and genitourinary defects have been rarely associated. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| A rare, genetic, central nervous system malformation syndrome characterized by early-onset, progressive, severe cerebellar ataxia associated with progressive, moderate to severe intellectual disability, global developmental delay, progressively coarsening facial features, relative macrocephaly and absence of seizures. Sensorineural hearing loss may be associated. Neuroimaging reveals cerebellar atrophy/hypoplasia. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare, genetic, syndromic intellectual disability disorder characterized by congenital, persistent microcephaly, low birth weight, short stature, childhood-onset seizures, global development delay, mild intellectual disability, and adolescent or young adult-onset diabetes mellitus. Gait ataxia, skeletal abnormalities, dorsocervical fat pad, and infantile cirrhosis may also be associated. Brain morphology is typically normal, although delayed myelination and hypoplastic brainstem have been reported. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
5 |
| A rare, genetic, neurometabolic disorder characterised by severe, progressive microcephaly, severe to profound global development delay, intellectual disability, seizures (typically tonic and/or myoclonic and frequently intractable), hyperekplexia, and axial hypotonia with appendicular spasticity, as well as hyperreflexia, dyskinetic quadriplegia, and abnormal brain morphology (cerebral atrophy with variable additional features including ventriculomegaly, pons and/or cerebellar hypoplasia, simplified gyral pattern and delayed myelination). Cortical blindness, feeding difficulties and respiratory insufficiency may also be associated. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare, fatal, inborn error of metabolism disorder characterized by respiratory distress and severe hypotonia at birth, severe global developmental delay, early-onset intractable seizures, myopathic facies with craniofacial dysmorphism (trigonocephaly/progressive microcephaly, low anterior hairline, arched eyebrows, hypotelorism, strabismus, small nose, prominent philtrum, thin upper lip, high-arched palate, micrognathia, malocclusion), severe, congenital flexion joint contractures and elevated serum creatine kinase levels. Scoliosis, optic atrophy, mild hepatomegaly, and hypoplastic genitalia may also be associated. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare, genetic disorder of thiamine metabolism and transport characterized by infantile spasms progressing to symptomatic generalized or partial seizures, severe global developmental delay, progressive brain atrophy, and bilateral thalamic and basal ganglia lesions. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
3 |
| A rare hemolytic anemia characterized by combination of neurologic features, such as psychomotor delay, seizures, variable movement disorders, and hemolytic anemia with stomatocytosis, resulting in cation-leaky erythrocytes, pseudohyperkalemia, hemolytic crises and hepatosplenomegaly. Cataracts are also a presenting feature. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
6 |
| Richieri Costa-da Silva syndrome is a rare, genetic, myotonic syndrome characterized by childhood onset of progressive and severe myotonia (with generalized muscular hypertrophy and progressive impairment of gait), short stature, skeletal abnormalities (including pectus carinatum, short, wedge-shaped thoracolumbar vertebrae, kyphoscoliosis, genu valgum, irregular femoral epiphyses), and mild to moderate intellectual deficiency. No facial dysmorphism nor joint limitation is associated. There have been no further descriptions in the literature since 1984. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare, genetic, syndromic intellectual disability disorder characterized by congenital, external, nuclear ophthalmoplegia, lingua scrotalis, progressive chorioretinal sclerosis and intellectual disability. Bilateral ptosis, bilateral facial weakness, Parinaud's syndrome, convergence paresis and myopia may be associated. There have been no further descriptions in the literature since 1975. |
Interprets |
False |
Intellectual ability |
Inferred relationship |
Some |
5 |
| A rare, multiple congenital anomalies/dysmorphic syndrome characterized by craniofacial dysmorphism, including microbrachycephaly, sloping forehead, micro/anophthalmia, large ears, prominent nasal root, mild micrognathia, and cleft palate, associated with cerebral palsy with choreoathetoid movements, intellectual disability, dextrocardia and longitudinal folding of plantae pedis. There have been no further descriptions in the literature since 1992. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
7 |
| A rare, genetic syndromic intellectual disability characterized by developmental delay, hypotonia, speech delay, mild to moderate intellectual disability, abnormal behavior (autistic, aggressive, hyperactive) and dysmorphic facial features, including synophrys or thick eyebrows, deep set eyes, bulbous nasal tip and full cheeks. Congenital heart and brain anomalies, visual and hearing impairment are also common. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare, genetic, neurological disease characterized by association of macrocephaly, dysmorphic facial features and psychomotor delay leading to intellectual disability and autism spectrum disorder. Facial dysmorphism may include frontal bossing, hypertelorism, midface hypoplasia, depressed nasal bridge, short nose, and long philtrum. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare, genetic, congenital muscular dystrophy due to dystroglycanopathy disorder characterized by a wide phenotypic spectrum which includes hypotonia and muscular weakness present at birth or early infancy and delayed or arrested motor development, associated with mild to severe intellectual disability and variable brain abnormalities on neuroimaging studies. Feeding difficulties, joint and spinal deformities, respiratory insufficiency, and ocular anomalies (e.g. strabismus, retinal dystrophy, oculomotor apraxia) may be associated. Decreased or absent alpha-dystroglycan on immunohistochemical muscle staining and elevated serum creatine kinase are observed. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare, syndromic intellectual disability characterized by global developmental delay including severely delayed or absent speech, moderate to severe intellectual disability, behavioral issues, stereotypic behavior, febrile seizures and epilepsy, abnormal gait, vision defects, and characteristic facial features. Intrauterine growth restriction and feeding difficulties are frequently present. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
| A rare, genetic, X-linked syndromic intellectual disability disorder characterized by moderate to severe intellectual disability associated with epilepsy, short stature, autistic features and behavioral problems, such as self-injury and aggressive outbursts. Observed facial dysmorphism includes brachycephaly, prominent supraorbital ridges, and deep set eyes. Additional variable manifestations include malposition of feet, asthenic habitus, hyporeflexia, bowel occlusions, hydronephrosis, ren arcuatus, delayed motor development and disturbed sleep-wake cycle. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
2 |
| A rare, genetic, multiple congenital anomalies/dysmorphic syndrome characterized by severe white matter hypoplasia, corpus callosum agenesis or extreme hypoplasia, severe intellectual disability, failure to thrive and minor midline facial dysmorphism (including hypertelorism, broad nasal root, micrognathia). There have been no further descriptions in the literature since 1993. |
Interprets |
True |
Intellectual ability |
Inferred relationship |
Some |
4 |
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