| 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:0000218 | High palate | "Height of the palate more than 2 SD above the mean (objective) or palatal height at the level of the first permanent molar more than twice the height of the teeth (subjective)." [pmid:19125428] |
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| HP:0000243 | Trigonocephaly | |
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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:0000286 | Epicanthus | "An epicanthal fold is a semilunar fold of skin that extends from the upper eyelid across the medial canthal area to the lower eyelid." [HPO:curators] |
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| HP:0000316 | Hypertelorism | |
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| HP:0000496 | Abnormality of eye movement | "An abnormality in voluntary or involuntary eye movements or their control." [HPO:probinson] |
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| HP:0000648 | Optic atrophy | |
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| HP:0000767 | Pectus excavatum | "A defect of the chest wall characterized by a depression of the sternum, giving the chest ("pectus") a caved-in ("excavatum") appearance." [HPO:curators] |
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| HP:0001249 | Mental retardation | |
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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:0001258 | Spastic paraplegia | |
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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:0001319 | Neonatal hypotonia | "Muscular hypotonia (abnormally low muscle tone) manifesting in the neonatal period." [HPO:curators] |
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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:0001338 | Partial agenesis of the corpus callosum | "A partial failure of the development of the corpus callosum." [HPO:curators] |
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| HP:0001942 | Metabolic acidosis | |
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| HP:0002317 | Unsteady gait | |
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| HP:0002416 | Subependymal cysts | |
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| HP:0002510 | Spastic tetraplegia | "Spastic paralysis affecting all four limbs." [HPO:curators] |
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| HP:0002928 | Decreased activity of the pyruvate dehydrogenase (PDH) complex | |
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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:0003348 | Hyperalaninemia | |
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| HP:0003542 | Increased serum pyruvate | "An abnormal increase in the concentration of pyruvate in the blood. Pyruvate is involved in energy metabolism, forming part of glycolysis and the citric acid cycle." [HPO:curators] |
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| HP:0003577 | Onset at birth | |
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| HP:0003828 | Variable expressivity | |
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| HP:0007010 | Poor fine motor coordination | |
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| HP:0007015 | Poor fine and gross motor coordination | |
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