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Living with Nemaline myopathy 5

A type of nemaline myopathy seen only in a few families in the Amish community, starting in the newborn period.

Understanding Nemaline myopathy 5

Nemaline myopathy 5 is a type of nemaline myopathy that has only been seen in several families of the Amish community.

Babies have low muscle tone from birth and delays in motor skills. Muscle weakness and wasting slowly get worse, especially in muscles near the center of the body. Joints can become tight, and the chest can have a pigeon-chest shape.

Signs & symptoms

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

  • Low muscle tone at birth
  • Delayed motor skills
  • Slowly worsening muscle weakness
  • Wasting of muscles near the center of the body
  • Tight hips and shoulders (contractures)
  • Pigeon chest (pectus carinatum)

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 TNNT1 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

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
Should we have genetic testing for the TNNT1 gene?
How should my child's breathing and feeding be supported?
Which therapies can help my child's movement?

Quick facts

Symptoms usually startNewborn
InheritanceAutosomal Recessive
GenesTNNT1

GARD lists changes in the TNNT1 gene. A child inherits a changed copy of the gene from each parent (autosomal recessive).

GeneticNeurological

Also known as: amish nemaline myopathy; anm; nem5; nem5a; nemaline myopathy 5, amish type; nemaline myopathy 5a, autosomal recessive, severe infantile

Patient organizations

Source: NIH GARD · Nemaline myopathy 5GARD ID 8334 · 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 Nemaline myopathy 5.

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