| HP:0000007 | Autosomal recessive inheritance | "A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in homozygotes. In the context of medical genetics, autosomal recessive disorders manifest in homozygotes (with two copies of the mutant allele) or compound heterozygotes (whereby each copy of a gene has a distinct mutant allele)." [HPO:curators] |
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| HP:0000252 | Microcephaly | "Microcephaly is a neurodevelopmental disorder in which the circumference of the head is more than two standard deviations smaller than the age- and gender-dependent norm." [HPO:curators] |
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| HP:0000708 | Behavioural/Psychiatric Abnormality | |
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| HP:0001250 | Seizures | "Seizures are an intermittent `abnormality of the central nervous system` (FMA:HP:0002011) due to a sudden, excessive, disorderly discharge of cerebral neurons and characterized clinically by some combination of disturbance of sensation, loss of consciousness, impairment of psychic function, or convulsive movements." [HPO:probinson] |
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| HP:0001251 | Ataxia | "Ataxia is a nonspecific neurological sign and symptom consisting of gross lack of coordination of muscle movements. Ataxia is caused by dysfunction of one or more parts of the nervous system including the cerebellum, the sensory nervous system, the vestibular system, or the cerebral cortex." [HPO:curators] |
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| HP:0001254 | Lethargy | |
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| HP:0001257 | Spasticity | "A motor disorder characterized by a velocity-dependent increase in tonic stretch reflexes with increased muscle tone, exaggerated (hyperexcitable) tendon reflexes." [HPO:curators] |
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| HP:0001263 | Developmental retardation | "A delay in the achievement of motor or mental milestones manifested prior to age 18 and generally associated with lifelong mental and/or physical impairments." [HPO:curators] |
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| HP:0001290 | Generalized hypotonia | "Generalized muscular hypotonia (abnormally low muscle tone)." [HPO:curators] |
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| HP:0001298 | Encephalopathy | |
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| HP:0001332 | Dystonia | "An abnormally increased muscular tone that causes fixed abnormal postures. There is a slow, intermittent twisting motion that leads to exaggerated turning and posture of the extremities and trunk." [HPO:curators] |
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| HP:0001399 | Hepatic failure | |
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| HP:0001410 | Decreased liver function | |
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| HP:0001508 | Failure to thrive | |
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| HP:0001638 | Cardiomyopathy | |
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| HP:0001639 | Hypertrophic cardiomyopathy | |
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| HP:0001942 | Metabolic acidosis | |
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| HP:0001943 | Hypoglycemia | "A lower than normal level of blood glucose." [HPO:curators] |
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| HP:0001987 | Hyperammonemia | |
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| HP:0002013 | Vomiting | |
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| HP:0002151 | Increased serum lactate | "Abnormally increased level of blood lactate (2-hydroxypropanoic acid). Lactate is produced from pyruvate by lactate dehydrogenase during normal metabolism." [HPO:curators] |
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| HP:0002240 | Hepatomegaly | "An abnormal enlargment of the liver." [HPO:curators] |
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| HP:0002480 | Hepatic encephalopathy | |
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| HP:0002910 | Elevated transaminases | "Elevations of the levels of SGOT and SGPT in the serum. SGOT (serum glutamic oxaloacetic transaminase) and SGPT (serum glutamic pyruvic transaminase) are transaminases primarily found in the liver and heart and are released into the bloodstream as the result of liver or heart damage. SGOT and SGPT are used clinically mainly as markers of liver damage." [HPO:curators] |
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| HP:0003128 | Lactic acidemia | "An abnormal buildup of `lactic acid` (CHEBI:28358) in the body, leading to `acidification` (GO:0045851) of the blood." [HPO:probinson] |
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| HP:0003234 | Decreased plasma carnitine | |
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| HP:0003394 | Muscle cramps | |
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| HP:0003828 | Variable expressivity | |
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| HP:0007663 | Decreased central vision | |
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| HP:0008344 | Elevated plasma branched chain amino acids | |
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| HP:0010913 | Hyperisoleucinemia | "An increased concentration of `isoleucine` (CHEBI:24898) in the `blood` (FMA:9670)." [HPO:gcarletti] |
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| HP:0011968 | Feeding difficulties | "Impaired ability to eat related to problems gathering food and getting ready to suck, chew, or swallow it." [ISCA:eriggs] |
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| HP:0012402 | Increased urine alpha-ketoglutarate concentration | "A greater than normal concentration of `2-oxoglutaric acid` (CHEBI:30915) in the urine." [HPO:probinson] |
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| HP:0012758 | Neurodevelopmental delay | |
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| HP:0030872 | Abnormal cardiac ventricular function | "An abnormality of the cardiac ventricular function." [NIHR:ldaugherty] |
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| HP:0100724 | Hypercoagulability | |
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