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Living with Childhood-onset nemaline myopathy

A mild form of nemaline myopathy, a muscle condition, that begins in childhood and mainly weakens the muscles far from the center of the body.

Understanding Childhood-onset nemaline myopathy

Childhood-onset nemaline myopathy is a mild type of nemaline myopathy with weakness in distal muscles, such as those in the hands and feet.

Muscle contraction is sometimes slow. GARD lists onset in childhood. Symptoms can include walking changes, clumsiness, and trouble with exercise.

Signs & symptoms

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

  • Walking difficulty (gait disturbance)
  • Clumsiness
  • Trouble with exercise
  • Weakness in the arms and legs
  • Delays in motor skills
  • Muscle stiffness

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. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists)
Expert care
Ask about multidisciplinary care centers for rare conditions
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 A Foundation Building Strength
  • 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
Which gene is involved, and can genetic testing find it?
What physical therapy or exercise approach is right for us?
Should swallowing or breathing be checked?

Quick facts

Symptoms usually startChild
InheritanceAutosomal Dominant

GARD says changes in genes cause this condition but doesn't name a specific gene. It is listed as autosomal dominant, so one changed copy of a gene can be enough.

GeneticNeurological

Also known as: mild nemaline myopathy

Patient organizations

Source: NIH GARD · Childhood-onset nemaline myopathyGARD ID 7171 · 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

Perspectives from people navigating life with Childhood-onset nemaline myopathy.

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HealthSpark

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