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Features include always present findings: Cytochrome C oxidase-negative muscle fibers; and very common findings: Feeding difficulties. 23 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Muscles | 11 | Generalized hypotonia, Hypertrophied muscle fibers, Muscle weakness |
Phenotype severity distribution: 1 always present feature, 1 very common feature, 3 common features.
No clinical trials have been registered for mitochondrial myopathy with reversible cytochrome C oxidase deficiency.
1 publication has been identified in PubMed for mitochondrial myopathy with reversible cytochrome C oxidase deficiency. Research spans Case Report / Case Series (100%).
Ma YT (2025). [PMID: 40008317](https://pubmed.ncbi.nlm.nih.gov/40008317/). *Case Rep Med*. [Case Report / Case Series]
Data assembled from 5 of 12 sources · Last updated Sep 20, 2026, 6:11 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
3 |
Elevated creatine kinase (muscle enzyme) (elevated circulating creatine kinase concentration), Increased circulating pyruvate concentration, Increased circulating lactate concentration |
Digestive system | 2 | Enlarged liver (hepatomegaly), Feeding difficulties |
Head and neck | 1 | Facial palsy |
Growth and development | 1 | Failure to thrive |
Brain and nerves | 1 | Hyporeflexia |
Lungs and breathing | 1 | Difficulty breathing due to muscle weakness (respiratory insufficiency due to muscle weakness) |