| 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:0000369 | Low-set ears | "Low-set ears are defined to be set below an arbitrary line drawn between the lateral canthus of the eye and the occipital protruberance." [HPO:curators] |
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| HP:0000431 | Broad nasal bridge | "Increased horizontal dimension of the upper, bony part of the nose." [HPO:curators] |
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| HP:0000988 | Skin rash | |
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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:0001290 | Generalized hypotonia | "Generalized muscular hypotonia (abnormally low muscle tone)." [HPO:curators] |
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| HP:0001298 | Encephalopathy | |
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| HP:0001347 | Hyperreflexia | "The presence of overactive or overresponsive reflexes." [HPO:curators] |
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| HP:0001371 | Contractures | |
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| HP:0001522 | Death in infancy | |
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| HP:0001662 | Bradycardia | |
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| HP:0001987 | Hyperammonemia | |
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| HP:0002079 | Hypoplasia of the corpus callosum | "Underdevelopment of the corpus callosum." [HPO:curators] |
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| HP:0002093 | Respiratory insufficiency | |
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| HP:0002104 | Apnea | "Lack of breathing with no movement of the respiratory muscles and no exchange of air in the lungs. This term refers to a disposition to have recurrent episodes of apnea rather than to a single event." [HPO:curators] |
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| HP:0002119 | Ventriculomegaly | |
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| HP:0002416 | Subependymal cysts | |
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| HP:0002983 | Micromelia | |
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| HP:0003429 | Hypomyelination | |
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| HP:0005280 | Depressed nasal root and bridge | |
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| HP:0007109 | Periventricular cysts | |
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| HP:0011344 | Severe global developmental delay | "A severe delay in the achievement of motor or mental milestones in the domains of development of a child." [DDD:hvfirth] |
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| HP:0012444 | Brain atrophy | "Partial or complete wasting (loss) of brain tissue that was once present." [HPO:probinson] |
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