| 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:0000505 | Impaired vision | |
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| HP:0000508 | Ptosis | "Drooping of the eyelid." [HPO:curators] |
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| HP:0000580 | Pigmentary retinopathy | |
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| HP:0000602 | Ophthalmoplegia | |
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| HP:0000639 | Nystagmus | "Rhythmic, involuntary oscillations of one or both eyes related to abnormality in fixation, conjugate gaze, or vestibular mechanisms." [HPO:curators] |
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| HP:0000648 | Optic atrophy | |
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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: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:0001319 | Neonatal hypotonia | "Muscular hypotonia (abnormally low muscle tone) manifesting in the neonatal period." [HPO:curators] |
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| HP:0001324 | Muscle weakness | "Reduced strength of muscles." [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:0001336 | Myoclonus | "Very brief, involuntary random muscular contractions occurring at rest, in response to sensory stimuli, or accompanying voluntary movements." [HPO:curators] |
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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:0001639 | Hypertrophic cardiomyopathy | |
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| HP:0001644 | Dilated cardiomyopathy | |
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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:0002376 | Developmental regression | |
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| HP:0003200 | Ragged-red muscle fibers | "An abnormal appearance of muscle fibers observed on muscle biopsy. Ragged red fibers can be visualized with Gomori trichrome (GT) staining as irregular and intensely red subsarcolemmal zones, whereas the normal myofibrils are green. The margins of affect fibers appear red and ragged." [HPO:curators] |
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| HP:0003487 | Babinski sign | "Upturning of the big toe (and sometimes fanning of the other toes) in response to stimulation of the sole of the foot. If the Babinski sign is present it can indicate damage to the corticospinal tract." [HPO:curators] |
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| HP:0003546 | Exercise intolerance | |
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| HP:0003593 | Early onset | |
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| HP:0003812 | Phenotypic variability | |
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| HP:0004322 | Decreased body height | "A height below that which is expected according to age and gender norms. Although there is no universally accepted definition of short stature, many refer to "short stature" as height more than 2 standard deviations below the mean for age and gender (or below the 3rd percentile for age and gender dependent norms)." [HPO:curators] |
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| HP:0004897 | lactic acidosis may occur with stress or infection | |
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| HP:0006980 | Leukoencephalopathy, progressive | |
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| HP:0008314 | Decreased activity of mitochondrial complex ii | |
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| HP:0008316 | Abnormal mitochondria on muscle biopsy | |
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| HP:0012240 | Increased intramyocellular lipid droplets | "An abnormal increase in intracellular lipid droplets In a muscle. The number and size of these drops can increase with somd disorders of lipid metabolism affecting muscle. See pmid 20691590 for histological images." [HPO:probinson, pmid:20691590] |
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| HP:0030682 | Left ventricular noncompaction | "Left ventricular noncompaction (LVNC) is defined by 3 markers: prominent left ventricular (LV) trabeculae, deep intertrabecular recesses, and the thin compacted layer." [PMID:16670098, PMID:25443708] |
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| HP:0100543 | Cognitive impairment | "Abnormality in the process of thought including the ability to process information." [HPO:sdoelken] |
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