| Inbound Relationships |
Type |
Active |
Source |
Characteristic |
Refinability |
Group |
| Gaucher disease type 2 is the acute neurological form of Gaucher disease. It is characterised by early-onset and severe neurological involvement of the brainstem, associated with an organomegaly and generally leading to death before the age of 2. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Arginase deficiency |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Sialidosis is a lysosomal storage disease, belonging to the group of oligosaccharidoses or glycoproteinoses, with a wide clinical spectrum that is divided into two main clinical subtypes: sialidosis type I, the milder, non-dysmorphic form of the disease characterized by gait abnormalities, progressive visual loss, bilateral macular cherry red spots and myoclonus, that presents in adolescence or adulthood (second or third decade of life); and sialidosis type II the more severe, early onset form, characterized by a progressive and severe mucopolysaccharidosis-like phenotype with coarse facies, visceromegaly, dysostosis multiplex, and developmental delay. Bilateral macular cherry red spots are also present. Sialidosis type II has been further divided into congenital (with hydrops fetalis), infantile and juvenile presentations. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Globoid cell leukodystrophy, late-onset |
Is a |
False |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Neuronal ceroid lipofuscinosis |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Gangliosidosis |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Niemann-Pick disease, type A |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Subacute neuronopathic Gaucher's disease |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Pelizaeus-Merzbacher disease |
Is a |
False |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Deficiency of cerebroside-sulfatase |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Alexander disease |
Is a |
False |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Niemann-Pick disease, type C, acute form |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Pyruvate carboxylase deficiency |
Is a |
False |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Monoamine oxidase-A deficiency is a very rare recessive X-linked biogenic amine metabolism disorder characterized clinically by mild intellectual deficit, impulsive aggressiveness, and sometimes violent behavior and presenting from childhood. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A lysosomal storage disease belonging to the group of sphingolipidoses. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| GM3 synthase deficiency is a rare congenital disorder of glycosylation due to impaired synthesis of complex ganglioside species initially characterized by irritability, poor feeding, failure to thrive and early-onset refractory epilepsy, followed by postnatal growth impairment, severe developmental delay or developmental regression, profound intellectual disability, deafness and abnormalities of skin pigmentation (mostly freckle-like hyperpigmented and depigmented macules). Visual impairment due to cortical atrophy (visible on magnetic resonance imaging), choreoathetosis and hypotonic tetraparesis usually appear gradually. Dysmorphic facial features may be associated. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Thiamine-responsive encephalopathy is a Wernicke-like encephalopathy characterized by seizures responsive to high doses of thiamine. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare lysosomal storage disease characterized clinically by severe global development delay due to neuronal dysmyelination, hypotonia which gradually progresses to spasticity during childhood, speech deficits, progressive visual impairment (due to corneal clouding, retinal degeneration and optic atrophy), achlorhydria, with increased gastrin secretion and iron deficiency anemia, and kidney disease and failure, all in the absence of dysmorphic features. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, genetic, inborn error of metabolism disorder characterized by neonatal-onset of developmental delay, hypotonia, hepatomegaly, lactic acidemia, increased creatine kinase levels, elevated alpha-ketoglutaric acid in urine, and a decreased plasma beta-hydroxybutyrate-to-acetoacetate ratio. Pyruvate dehydrogenase deficiency can be associated, leading to hypoglycemia and neurologic anomalies, including seizures. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| An autosomal recessive form of serine deficiency. The juvenile disease has clinical characteristics in the few reported cases of absence seizures, moderate developmental delay and behavioral disorders. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| An autosomal recessive form of serine deficiency. The infantile disease has clinical characteristics in the few reported cases of congenital microcephaly, psychomotor retardation and intractable seizures. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| CADDS is a rare, genetic, neurometabolic disease characterized by severe intrauterine growth retardation, failure to thrive, profound neonatal hypotonia, severe global development delay, elevated very long chain fatty acids in plasma, and neonatal cholestasis leading to hepatic failure and death. Other features include ocular abnormalities (e.g. blindness and cataracts), sensorineural deafness, seizures, and abnormal brain morphology (notably delayed CNS myelination and ventriculomegaly). |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Congenital cataract-hearing loss-severe developmental delay syndrome is a rare, genetic, lethal, neurometabolic disease characterized by congenital cataracts, sensorineural hearing loss, severe psychomotor developmental delay, severe, generalized muscular hypotonia, and central nervous system abnormalities (including cerebellar and cerebral hypoplasia, hypomyelination, wide subarachnoid spaces), in the presence of low serum copper and ceruloplasmin. Nystagmus and seizures have also been reported. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, genetic, mitochondrial oxidative phosphorylation disorder characterized by intrauterine growth retardation, microcephaly, hypotonia, vision impairment, speech and language delay and lactic acidosis with reduced respiratory chain activity (typically complex I). Additional features may include macrocytic anemia, tremor, muscular atrophy, dysmetria and mild intellectual disability. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| 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. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare neurometabolic disease characterized by a neonatal onset of seizures (often intractable), muscular hypotonia, feeding difficulties (poor sucking and/or swallowing) and mild to severe psychomotor delay, associated with nonketotic hyperglycinemia typically revealed by biochemical analysis. Respiratory problems (apnea, acute respiratory acidosis), lethargy, hearing loss, microcephaly and spasticity with pyramidal signs may also be associated. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, congenital muscular dystrophy due to dystroglycanopathy characterized by proximal muscle weakness with a tendency for muscle hypertrophy and pseudohypertrophy, variable cognitive impairment, microcephaly, cerebellar hypoplasia with or without cysts, and other structural brain anomalies. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| 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. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, genetic, mitochondrial oxidative phosphorylation disorder characterized by a highly variable phenotype which ranges from a fatal neonatal/infantile encephalomyopathy with lactic acidosis, hyporeflexia/areflexia, severe hypotonia and respiratory failure to less severe cases presenting with central hypotonia, global developmental delay, congenital sensorineural hearing loss, and renal disease. Additional, variably observed, clinical features include intellectual disability, seizures, and cardiomyopathy. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, life-threatening, mitochondrial DNA depletion syndrome disease characterized by severe, progressive sensorimotor neuropathy associated with corneal ulceration, scarring or anesthesia, acral mutilation, metabolic and immunologic derangement, and hepatopathy (which can manifest with fulminant hepatic failure, a Reye-like syndrome or indolent progression to liver cirrhosis, depending on clinical form involved), present in the Navajo Native American population. Clinical presentation includes failure to thrive, distal limb weakness with reduced sensation, limb contractures with loss of function, areflexia, recurrent metabolic acidosis with intercurrent illness, immunologic anomalies manifesting with severe systemic infections, and sexual infantilism. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| MEGDEL syndrome is a rare, genetic, neurometabolic disorder characterised by neonatal hypoglycaemia, features of sepsis that are not linked to infection, development of feeding problems, failure to thrive, transient liver dysfunction, and truncal hypotonia followed by dystonia and spasticity which results in psychomotor development arrest and/or regression. Progressive sensorineural deafness, intellectual disability and absent speech are also associated. Laboratory tests demonstrate 3-methylglutaconic aciduria and temporary elevated serum lactate and transaminases. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Lethal left ventricular non-compaction-seizures-hypotonia-cataract-developmental delay syndrome is rare, genetic, neurometabolic disease characterized by global developmental delay, severe hypotonia, seizures, cataracts, cardiomyopathy (including left or bi-ventricular hypertrophy, dilated cardiomyopathy) and left ventricular non-compaction, typically resulting in infantile or early-childhood death. Patients usually present metabolic lactic acidosis, failure to thrive, head lag, respiratory problems and decrease in respiratory chain complex activity. Highly variable cerebral abnormalities have been reported and include microcephaly, prominent extra-axial cerebrospinal fluid spaces, diffuse neuronal loss and cortical/white matter gliosis. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare mitochondrial oxidative phosphorylation disorder characterized by neonatal onset of hypotonia, feeding difficulties, deafness, and early fatal respiratory failure. Cardiac and liver involvement has been reported. Serum lactate is increased, and metabolic studies show decreased activity of mitochondrial respiratory complexes I and IV in skeletal muscle. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare mitochondrial oxidative phosphorylation disorder characterized by microcephaly, global developmental delay, spastic-dystonic movement disorder, intractable seizures, optic atrophy, autonomic dysfunction, and peripheral neuropathy. Serum lactate is increased, and muscle biopsy shows decreased activity of mitochondrial respiratory complexes I and III. Brain imaging reveals progressive cerebellar atrophy and delayed myelination. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare mitochondrial oxidative phosphorylation disorder characterized by a variable clinical phenotype including infantile onset of epileptic encephalopathy, hypotonia, global developmental delay, failure to thrive, complex movement disorder, and liver involvement, as well as childhood onset of severe myoclonus epilepsy, cognitive decline, progressive hearing and visual impairment, and progressive tetraparesis. Serum lactate may be increased, and brain imaging shows variable atrophy and white matter abnormalities. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Combined oxidative phosphorylation defect type 25 is a rare mitochondrial oxidative phosphorylation disorder with decreased respiratory complex I and IV enzyme activities, characterized by hypotonia, global developmental delay, neonatal onset of progressive pectus carinatum without other skeletal abnormalities, poor growth, sensorineural hearing loss, dysmorphic features and brain abnormalities such as cerebral atrophy, quadriventricular dilatation and thin corpus callosum posteriorly. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare mitochondrial disease characterized by early onset of hypertrophic cardiomyopathy and variable neurologic symptoms including global developmental delay, hypotonia, intellectual disability, visual impairment, and seizures. Lactic acidosis is present in all patients. Muscle biopsy usually shows decreased activity of mitochondrial complexes I and IV. Brain imaging may reveal variable abnormal signal intensities in the thalamus, basal ganglia, and/or brain stem. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Seizures-scoliosis-macrocephaly syndrome is a rare, genetic neurometabolic disorder characterized by seizures, macrocephaly, delayed motor milestones, moderate intellectual disability, scoliosis with no exostoses, muscular hypotonia present since birth, as well as renal dysfunction. Coarse facial features (including hypertelorism and long hypoplastic philtrum) and bilateral cryptorchidism (in males) are also commonly reported. Additional manifestations include abnormal gastrointestinal motility (resulting in constipation, diarrhea, gastroesophageal reflux and dysphagia), gait disturbances, strabismus and ventricular septal defects. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare neurometabolic disease, due to a lipoic acid biosynthesis defect, with a highly variable phenotype, typically characterized by early-onset acute or subacute developmental delay or regression frequently associated with feeding difficulties. Clinical severity is variable and may range from mild cases which present a later onset with slow neurological deterioration and general improvement over time to severe cases with clinical signs since birth and leading to early death. Associated manifestations include hypotonia, vision loss, respiratory failure, seizures, and intellectual disability. Brain magnetic resonance imaging frequently shows cavitating leukoencephalopathy with lesions in the periventricular/central white matter and parieto-occipital lobes. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, severe, genetic, neurometabolic disease characterized by infantile-onset of progressive neurodevelopmental regression, optic atrophy with nystagmus and diffuse white matter disease. Affected individuals usually have central hypotonia that progresses to limb spasticity and hyperreflexia, eventually resulting in a vegetative state. Recurrent chest infections are frequently associated and seizures (usually generalized tonic-clonic) may occasionally be observed. Brain magnetic resonance imaging shows diffuse bilateral symmetric abnormalities in the cerebral periventricular white matter, with variable lesions in other areas but sparing the basal ganglia. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, genetic, neurometabolic disease characterized by early onset encephalopathy with progressive microcephaly, severe global development delay, seizures, hypotonia, feeding difficulties, variable cardiac abnormalities, and cataracts. Brain MRI shows distinct pattern with high T2 signal and restricted diffusion in the posterior limb of the internal capsule in combination with delayed myelination and progressive cerebral atrophy. The disease is typically fatal. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare autosomal ichthyosis syndrome with prominent neurologic signs characterized by the association of congenital ichthyosis with global developmental delay, intellectual disability, infantile-onset seizures, and spastic tetraplegia. Brain imaging may show delayed myelination and cerebral atrophy. Marked intrafamilial variability has been reported. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Mitochondrial DNA depletion syndrome, encephalomyopathic form is a group of mitochondrial DNA maintenance syndrome diseases characterized by predominantly neuromuscular manifestations with typically infantile onset of hypotonia, lactic acidosis, psychomotor delay, progressive hyperkinetic-dystonic movement disorders, external ophthalmoplegia, sensorineural hearing loss, generalized seizures and variable renal tubular dysfunction. It may be associated with a broad range of other clinical features. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A lysosomal storage disease with characteristics of coarse facial features, macular cherry red spot, and dysostosis multiplex. Clinical presentation can be heterogeneous ranging from a severe, early-onset, rapidly progressive infantile form to late onset, slowly progressive juvenile/adult form. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare congenital disorder of glycosylation characterized by neonatal hypotonia, global development delay, developmental regress and severe to profound intellectual disability, infantile onset seizures that are initially associated with febrile episodes with subsequent transition to unprovoked seizures, impaired vision with esotropia and nystagmus, progressive cerebral and cerebellar atrophy, skeletal abnormalities (including brachycephaly, scoliosis, slender long bones, delayed bone age, pectus excavatum and osteopenia), inverted nipples and dysmorphic features including high and narrow forehead, frontal bossing, short nose, depressed nasal bridge, anteverted nares, high palate and wide open mouth consistent with facial hypotonia. Other features may include cardiac abnormalities (such as patent ductus arteriosus, atrial septal defects), urogenital abnormalities (such as nephrocalcinosis, urolithiasis), and low plasma concentration of alkaline phosphatase. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, congenital disorder of glycosylation characterized by severe or profound global developmental delay, early epileptic encephalopathy, muscular hypotonia, dysmorphic features (coarse facies, thick eyebrows, broad nasal bridge, thick lips, inverted nipples), variable ocular defects and brain morphological abnormalities on brain MRI (cerebral atrophy, thin corpus callosum). |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, genetic, lethal, neurometabolic malformation syndrome characterized by multiple, variable, congenital cardiac (systolic murmur, atrial septal defect), urinary (duplicated collecting system, vesicoureteral reflux) and central nervous system (thin corpus callosum, cerebellar hypoplasia) malformations associated with neonatal hypotonia, early-onset epileptic encephalopathy, and myoclonic seizures. Craniofacial dysmorphism (prominent occiput, enlarged fontanel, fused metopic suture, upslanted palpebral fissures, overfolded helix, depressed nasal bridge, anteverted nose, malar flattening, microstomia with downturned corners, Pierre-Robin sequence, high arched palate, short neck) and other manifestations (joint contractures, hyperreflexia, dysplastic nails, developmental delay) are also observed. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Ethylmalonic acid encephalopathy (EE) is defined by elevated excretion of ethylmalonic acid (EMA) with recurrent petechiae, orthostatic acrocyanosis and chronic diarrhea associated with neurodevelopmental delay, psychomotor regression and hypotonia with brain magnetic resonance imaging (MRI) abnormalities. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Hereditary hyperekplexia is a hereditary neurological disorder characterized by excessive startle responses. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| 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. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare degenerative mitochondrial disease characterized by chronic metabolic acidosis, hypotonia, facial dysmorphism and delayed development. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Pyridoxine-dependent epilepsy (disorder) |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Leukoencephalopathy-dystonia-motor neuropathy syndrome is a peroxisomal neurodegenerative disorder characterized by spasmodic torticollis, dystonic head tremor, intention tremor, nystagmus, hyposmia, and hypergonadotrophic hypogonadism with azoospermia. Slight cerebellar signs (left-sided intention tremor, balance and gait impairment) are also noted. Magnetic resonance imaging (MRI) shows bilateral hyperintense signals in the thalamus, butterfly-like lesions in the pons, and lesions in the occipital region, whereas nerve conduction studies of the lower extremities shows a predominantly motor and slight sensory neuropathy. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A form of congenital disorders of N-linked glycosylation characterized by distal arthrogryposis (mild flexion contractures of the fingers, deviation of the distal phalanges, swan-neck deformity), retromicrognathia, general muscle hypotonia, delayed psychomotor development, autism spectrum disorder (speech delay, abnormal use of speech, difficulties in initiating, understanding and maintaining social interaction, limited non-verbal communication and repetitive behavior), seizures, microcephaly and mild to moderate intellectual disability that becomes apparent with age. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, mitochondrial DNA maintenance syndrome characterized by early-onset cerebellar ataxia, and variable combination of epilepsy, headache, dysarthria, ophthalmoplegia, peripheral neuropathy, intellectual disability, psychiatric symptoms and movement disorders. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, genetic, syndromic, sterol biosynthesis disorder affecting males characterized by skin manifestations, including collodion membrane, ichthyosis, and patchy hypo-pigmentary lesions, associated with severe neurological involvement (e.g. intellectual disability, delayed psychomotor development, seizures, hydrocephalus, cerebellar/corpus callosum hypoplasia, Dandy-Walker malformation, hypotonia) and craniofacial dysmorphism (large anterior fontanelle, telecanthus, hypertelorism, microphthalmia, prominent nasal bridge, low-set ears, micrognathia, cleft palate). 2,3 toe syndactyly, polydactyly, and kyphosis, as well as ophthalmic, cardiac and urogenital anomalies may also be associated. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, genetic, mitochondrial DNA depletion syndrome characterized by neonatal or early-infantile onset hepatopathy (manifesting with hepatomegaly, cholestasis, increased transaminases, coagulopathy, hypoalbuminemia, ascites, and/or liver failure), associated with renal tubulopathy and progressive neurodegenerative manifestations, which include muscular atrophy, hyporeflexia, ataxia, sensory neuropathy, epilepsy, sensorineural hearing impairment, psychomotor regression, athetosis, nystagmus, and/or ophthalmoplegia. Patients typically present with recurrent vomiting, severe failure to thrive, feeding difficulties, and fasting hypoglycemia. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| 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. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, genetic, multiple congenital anomalies/dysmorphic syndrome characterized by severe global developmental delay, hypotonia, and early-onset seizures, associated with multiple congenital anomalies, such as cardiac (e.g. patent foramen ovale, atrial septal defect, patent ductus arteriosus), genitourinary (i.e. hydrocele, renal collecting system dilatation, hydroureter, hydronephrosis, hypertrophic trabecular urinary bladder) and gastrointestinal abnormalities (including gastroesophageal reflux, anal stenosis, imperforate anus, ano-vestibular fistula), as well as facial dysmorphism which includes coarse facies, a prominent occiput, bitemporal narrowing, epicanthal folds, hypertelorism, nystagmus/strabismus/wandering eyes, low-set, large ears with auricle abnormalities, depressed nasal bridge, upturned nose, long philtrum, large, open mouth with thin lips, high-arched palate, and micro/retrognathia. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Leber's optic atrophy |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare oligosaccharidosis characterised by facial dysmorphism, progressive intellectual disability and psychomotor deterioration due to accumulation of glycoasparagines in tissues and body fluids. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| HSMN IV |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Cerebral lipidosis |
Is a |
False |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Nicotinamide adenine dinucleotide coenzyme Q reductase deficiency |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Alpha-N-acetylgalactosaminidase deficiency |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Acyl-CoA oxidase deficiency |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Thyrotoxicosis due to pituitary thyroid hormone resistance |
Is a |
False |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Myoclonic epilepsy myopathy sensory ataxia (disorder) |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Allan-Herndon-Dudley syndrome |
Is a |
False |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Severe X-linked mitochondrial encephalomyopathy is an extremely rare mitochondrial respiratory chain disease resulting in a neurodegenerative disorder characterized by psychomotor delay, hypotonia, areflexia, muscle weakness and wasting in the two patients reported to date. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Folinic acid-responsive seizures is a very rare neonatal epileptic encephalopathy disorder characterized clinically by myoclonic and clonic, or clonic seizures associated with apnea occurring several hours to 5 days after birth and responding to folinic acid. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| 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. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare immune disease characterized by severely reduced mitochondrial DNA content due to DGUOK deficiency typically manifesting with early-onset liver dysfunction, psychomotor delay, hypotonia, rotary nystagmus that develops into opsoclonus, lactic acidosis and hypoglycemia. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare pyruvate metabolism disorder characterized by neonatal onset of a mitochondrial encephalopathy with global developmental delay and the biochemical characteristics of lactic acidosis and increased serum pyruvate with normal lactate/pyruvate ratio. Additional reported manifestations include epilepsy, peripheral neuropathy, hypotonia, nystagmus, extensor plantar responses, hepatomegaly, and craniofacial dysmorphism (such as progressive microcephaly, epicanthus, long philtrum, and thin upper lip). |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare congenital disorder of glycosylation characterized by neonatal onset of global developmental delay, hypotonia, failure to thrive, hematological/immunological abnormalities, recurrent infections, liver involvement (with hepatosplenomegaly, cholestasis, fibrosis, or cirrhosis), and enteropathy. Additional reported manifestations include dysmorphic craniofacial features (such as microcephaly, broad palpebral fissures, and retrognathia), hypohidrosis, hyperkeratosis, and cardiac and musculoskeletal anomalies. Brain imaging may show hypoplastic corpus callosum, cerebral and cerebellar atrophy, and enlarged ventricles. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare mitochondrial disease characterized by a highly variable phenotypic spectrum comprising delayed motor development, peripheral neuropathy, cataract, short stature due to growth hormone deficiency, nystagmus, sensorineural hearing loss, dysmorphic facial features, and skeletal abnormalities consistent with spondyloepimetaphyseal dysplasia. Hyperextensible joints, achalasia, and telangiectasia have also been described. Cognition is normal. Atrophy of the pituitary gland has been observed in brain imaging. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare disorder of ornithine metabolism characterized by global developmental delay, alopecia, macrocephaly, and dysmorphic facial features (including high and broad forehead, hypertelorism, ptosis, blepharophimosis, downslanting palpebral fissures, deep-set eyes, large ears, and retrognathia or high arched palate). Additional reported manifestations are sensorineural hearing loss, spasticity, hypotonia, hypoplastic nails, cryptorchidism, and clinodactyly, among others. Brain imaging may show white matter abnormalities, periventricular cysts, enlarged lateral ventricles, or prominent perivascular spaces. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare genetic neurometabolic disease characterized by early neonatal refractory seizures, hypotonia, and respiratory failure. Brain imaging reveals simplified gyral pattern of the frontal lobes, white matter abnormalities, gliosis and volume loss in various brain regions, and vasogenic edema. Serum glutamine levels are significantly elevated. Death occurs within weeks after birth. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare genetic, skeletal muscle disease with characteristics of early-onset hypotonia, muscle weakness, global developmental delay with intellectual disability and cardiomyopathy. Congenital structural heart defects and ichthyosiform cutaneous lesions have also been associated. Muscle biopsy shows characteristic enlarged mitochondria located at the periphery of muscle fibres. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Limb-girdle muscular dystrophy due to POMK deficiency is a form of limb-girdle muscular dystrophy presenting in infancy with muscle weakness and delayed motor development (eventually learning to walk at 18 months of age) followed by progressive proximal weakness, pseudohypertrophy of calf muscles, mild facial weakness, and borderline intelligence. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare genetic neurological disorder characterized by childhood-onset dystonia with distinctive MRI changes in the basal ganglia, and optic atrophy developing either immediately or within a few years after the appearance of dystonia. Additional symptoms include chorea and other movement disorders, dysarthria, or nystagmus, among others. Motor disability progresses gradually, while cognitive function is relatively spared. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare mitochondrial disease characterised by a variable phenotype comprising delayed psychomotor development or neurodevelopmental regression, hypotonia, seizures, microcephaly, optic atrophy, pyramidal signs, and peripheral neuropathy, among others. Age of onset and disease severity are also variable with some cases taking a fatal course in early infancy. Serum lactate levels may be elevated. Reported brain imaging findings include abnormal signals in the basal ganglia, cerebral and/or cerebellar atrophy, and white matter abnormalities. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare congenital disorder of glycosylation caused by mutations in the CAD gene and characterized by epileptic encephalopathy, global developmental delay, normocytic anemia and anisopoikilocytosis. Loss of acquired skills in early childhood is present and natural disease course can be lethal in early childhood. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare neurometabolic disorder due to serine deficiency characterized by neonatal to infantile onset of global developmental delay, postnatal microcephaly and intellectual disability, which may be associated with slowly progressive spastic tetraplegia mainly affecting the lower extremities, seizures, and brain MRI findings including thin corpus callosum, delayed myelination and cerebral atrophy. Additional symptoms include brisk deep tendon reflexes, extensor plantar responses, behavioral abnormalities (such as irritability, hyperactivity, sleep disorder), abnormal hand movements and stereotypy. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare mitochondrial myopathy characterized by motor developmental delay (in infancy), growth impairment and mostly proximal muscle weakness caused by a muscular dystrophy. Muscle biopsy presents myopathic abnormalities and decreased mtDNA content. Electromyography (EMG) shows a myopathic process and serum creatine kinase is increased. The disease is also characterized by early onset non-progressive cerebellar atrophy (particularly cerebellar vermis and hemispheres), corticospinal tract dysfunction, and global or partial cerebral atrophy on brain MRI. Additionally, some patients presented with cognitive deficiencies, skeletal abnormalities, tremors, and retinopathy. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare disorder of plasmalogen biosynthesis characterized by syndromic severe intellectual disability with congenital cataracts, early-onset epilepsy, microcephaly, global developmental delay, growth retardation and short stature, and spastic quadriparesis. Dysmorphic facial features may be present, including high-arched eyebrows, flattened nasal root, hypertelorism, and long and smooth philtrum. Rhizomelia is not part of the syndrome. Cerebellar atrophy, white matter abnormalities, and Dandy-Walker malformation have been described on brain imaging. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare neurometabolic disease characterized by infantile onset of repeated episodes of developmental regression and neurodegeneration, often triggered by febrile illnesses. Patients present with lethargy, hypotonia, irritability, gait ataxia, loss of speech, movement disorder, seizures, ophthalmoplegia, and hearing loss. Brain imaging shows generalized cerebral atrophy and bilateral basal ganglia abnormalities. Extensive skin lesions, cardiomyopathy, and pancytopenia have been reported in association. The condition is fatal in the first years of life. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare neurometabolic disease characterized by infantile onset of rapidly progressive neurological deterioration, typically precipitated by a febrile illness. Patients present with hypotonia, loss of previously acquired motor milestones and cognitive skills, ataxia, nystagmus, tremor, seizures, tetraparesis, and respiratory failure, eventually resulting in a vegetative state. Imaging of the brain and spinal cord may show white matter abnormalities, cerebral atrophy, cerebellar edema, and spinal myelopathy. Subacute development of extensive bullous skin lesions within weeks of onset of neurological symptoms has also been reported. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Fabry's disease |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare genetic neurometabolic disease characterized by childhood onset of global developmental delay, progressive spastic ataxia leading to loss of independent ambulation, and elevated plasma levels of glutamine. Optic atrophy, tremor, and dysarthria have also been reported. Brain imaging may show cerebellar atrophy. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare mitochondrial oxidative phosphorylation disorder characterized by a spectrum of three main clinical phenotypes comprising a severe neonatal phenotype with early fatal lactic acidosis, a more protracted course with early-onset developmental delay, motor weakness, extrapyramidal signs, with or without epilepsy, and a phenotype with normal early development and Parkinson-like symptoms starting around the age of one year. Additional, variably reported, signs and symptoms include cardiomyopathy, optic anomalies, hepatosplenomegaly, and abnormal brain MRI findings, among others. Deficiencies in mitochondrial oxidative phosphorylation enzymes are inconsistent. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Adrenoleukodystrophy |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Cholestanol storage disease |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare mitochondrial disease characterized by early infantile onset of progressive neurological deterioration with seizures, spasticity, and lack of psychomotor development. Brain imaging shows severe leukodystrophy and abnormalities of neuronal migration. Lactic acidosis is common. The disease is usually fatal in early childhood. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare mitochondrial disease characterized by onset of episodic developmental regression in the first year of life, often in the setting of febrile illnesses, as well as hypotonia and seizures or refractory epileptic encephalopathy. Other observed features include ataxia, dystonia, or optic atrophy, among others. Patients do not achieve independent ambulation or meaningful speech. Brain imaging may show progressive cerebellar or diffuse atrophy and signal abnormalities of the basal ganglia. Serum lactate is often elevated. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare mitochondrial disease characterized by infantile onset of severe regression after a period of normal development, epileptic encephalopathy, hypotonia, movement disorder, cardiomyopathy, hyperglycinemia, and lactic acidosis. Optic atrophy may also be present. Brain imaging findings are highly variable and include white matter abnormalities. The disease is typically fatal in infancy. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare inborn error of metabolism comprising 3-phosphoglycerate dehydrogenase deficiency, 3-phosphoserine phosphatase deficiency, and phosphoserine aminotransferase deficiency, and characterized by a phenotypic spectrum ranging from congenital microcephaly, psychomotor retardation, and intractable seizures in the infantile forms to milder juvenile forms with moderate developmental delay and intellectual disability. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Galactosylceramide beta-galactosidase deficiency |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| Metachromatic leucodystrophy (disorder) |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A rare, genetic neurodegenerative disease characterized by childhood or adolescent-onset of cerebellar ataxia with dysarthria which slowly progresses and associates pyramidal signs, including lower limb spasticity, brisk reflexes, and Babinski and Hoffman signs. Patients typically present cerebellar ataxia with development of increasing asymmetric spasticity in upper and lower limbs, and variable axonal sensory or sensorimotor neuropathy. Additional heterogeneous features, including pes cavus, scoliosis, and abnormalities of the brain (e.g. cerebral atrophy), may also be associated. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
| A clinically heterogeneous progressive condition characterised by a combination of proximal neurogenic muscle weakness, sensory-motor neuropathy, ataxia, and pigmentary retinopathy. |
Is a |
True |
Inherited metabolic disorder of nervous system |
Inferred relationship |
Some |
|
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