| A rare mitochondrial oxidative phosphorylation disorder with complex I and IV deficiency and characteristics of hypertrophic cardiomyopathy, hepatic steatosis with elevated liver transaminases, exercise intolerance and muscle weakness. Neuro-ophthalmological features (hemiplegic migraine, Leigh-like lesions on brain MRI, pigmentary retinopathy) have been reported later in life. Caused by homozygous mutation in the MRPL44 gene on chromosome 2. |