familial cardiomyopathy inborn mitochondrial myopathy fatal infantile encephalocardiomyopathy https://rarediseases.info.nih.gov/diseases/1113/fatal-infantile-encephalomyopathy https://www.malacards.org/card/cox_deficiency_infantile_mitochondrial_myopathy UMLS:C4273730 Orphanet:1561 Fatal infantile cytochrome C oxidase deficiency is a very rare mitochondrial disease characterized clinically by cardioencephalomyopathy resulting in death in infancy. fatal infantile encephalomyopathy Editor note: check GARD xref fatal infantile cardioencephalomyopathy due to cytochrome C oxidase deficiency SCTID:718124006 DOID:0050713 GARD:0016569 MONDO:0015487 fatal infantile cytochrome C oxidase deficiency MEDGEN:903874 fatal infantile cardioencephalomyopathy due to cytochrome c oxidase deficiency fatal infantile COX deficiency mitochondrial oxidative phosphorylation disorder