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MULTIPLE MITOCHONDRIAL DYSFUNCTIONS SYNDROME 6 (MMDS6)

MULTIPLE MITOCHONDRIAL DYSFUNCTIONS SYNDROME 6 (MMDS6)
617954
OMIM = Online Mendelian Inheritance of Men
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Mitochondrial-processing peptidase subunit beta
7q22.1
very rare
autosomal recessive
mutation in the PMPCB gen
Laboratory findings    L-Lactic acid inc (serum)
Symptoms    ataxia
    cerebellar atrophy or hypoplasia
    developmental delay
    developmental regression
    dystonia
    encephalopathy
    epilepsy
    failure to thrive
    feeding difficulties, poor feeding
    hearing defect, deafness
    hypertonia, spasticity
    hypotonia
    intellectual disability/intellectual developmental disorder
    Leigh syndrome
    leukoencephalopathy
    microcephaly (<2 SD for age)
    onset, childhood
    onset, infancy
    psychomotor retardation