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Living with Combined oxidative phosphorylation defect type 30

A rare mitochondrial condition in newborns with low muscle tone, feeding trouble, hearing loss and breathing problems.

Understanding Combined oxidative phosphorylation defect type 30

Combined oxidative phosphorylation defect type 30 is a rare mitochondrial disease that begins in newborns.

Babies have low muscle tone, feeding difficulties, deafness and respiratory failure. Heart and liver involvement has been reported. Blood lactate is raised, and muscle tests show lower activity of energy-making complexes.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Low muscle tone (hypotonia)
  • Feeding difficulties and poor suck
  • Hearing loss (sensorineural)
  • Breathing failure
  • Thickened heart wall (left ventricular hypertrophy)
  • Acid reflux

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include brain and nervous system specialists and genetic specialists.

  3. Consider genetic testing

    Changes in TRMT10C are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    United Mitochondrial Disease Foundation and MitoAction may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists)
Expert care
Expert lists: United Mitochondrial Disease Foundation, MitoAction
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with United Mitochondrial Disease Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Should we have genetic testing for the TRMT10C gene?
How can we support feeding and breathing?
How should the heart and liver be checked?

Quick facts

Symptoms usually startNewborn
InheritanceAutosomal Recessive, Mitochondrial
GenesTRMT10C

Changes in the TRMT10C gene are listed. GARD lists autosomal recessive and mitochondrial inheritance.

GeneticNeurologicalInherited MetabolicMitochondrial

Also known as: combined oxidative phosphorylation deficiency 30; combined oxidative phosphorylation deficiency caused by mutation in trmt10c; combined oxidative phosphorylation deficiency type 30; coxpd30; coxpd30 - combined oxidative phosphorylation defect type 30; trmt10c combined oxidative phosphorylation deficiency

Patient organizations

Source: NIH GARD · Combined oxidative phosphorylation defect type 30GARD ID 17864 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

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