Abstract
Mitochondrial disorders can present with a very wide clinical variability depending on the affected gene. Novel mutations in mitochondrial diseases are being identified more frequently than the past decades in the Lebanese population, where these disorders rank as the most common inborn errors of metabolism. Here we describe a novel COX10 variant in a female patient from south Lebanon, presenting with congenital cataracts, failure to thrive, microcephaly, global developmental delay and behavioral problems. The patient carries a not reported before missense mutation in the COX10 gene (c.514A>G p.(Thr172Ala)), confirming the diagnosis of a homozygous COX10 variant, in favor of Leigh syndrome The cataracts finding. This is to our knowledge the first reported patient with COX10 mutation presenting with congenital cataracts; thus, adding to the clinical spectrum of this disease.
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