Table 2.

SUCLA2-Related Mitochondrial DNA Depletion Syndrome, Encephalomyopathic Form with Methylmalonic Aciduria: Frequency of Select Features

Feature% of Persons w/Feature
Development Developmental delay / intellectual disability95%
Regression10%
Neuromuscular Hypotonia90%
Dystonia80%
Muscle atrophy40%
Choreoathetosis30%
Muscle weakness20%
Hypertonia10%
Epilepsy10%
Myoclonus10%
Neuropathy10%
Sensorineural hearing impairment 90%
Feeding/gastrointestinal Feeding difficulties50%
Recurrent vomiting20%
Gastroesophageal reflux disease10%
Growth deficiency 90%
Vision/ophthalmologic Ptosis20%
Ophthalmoplegia10%
Strabismus10%
Respiratory Respiratory distress10%
Recurrent respiratory infections10%
Skeletal Kyphoscoliosis20%
Joint contractures10%
Other Hypoglycemia10%
Hyperhidrosis10%

From: SUCLA2-Related Mitochondrial DNA Depletion Syndrome, Encephalomyopathic Form with Methylmalonic Aciduria

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