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Living with Autosomal recessive myogenic arthrogryposis multiplex congenita

A rare inherited muscle condition with stiff joints present from birth and weakness that slowly worsens.

Understanding Autosomal recessive myogenic arthrogryposis multiplex congenita

Autosomal recessive myogenic arthrogryposis multiplex congenita is a rare inherited nerve and muscle condition that shows up before birth.

Babies move less before birth, often noticed in the second trimester, and are born with stiff joints in the arms and legs, often on both sides. Newborns have very low muscle tone and clubfoot on both sides. Motor milestones are delayed, and the condition slowly worsens, with loss of walking after the first ten years of life.

Signs & symptoms

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

  • Stiff joints from birth (arthrogryposis)
  • Clubfoot on both sides
  • Low muscle tone in newborns
  • Fewer baby movements before birth
  • Mild facial weakness
  • Scoliosis

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 bone and joint specialists, brain and nervous system specialists and genetic specialists.

  3. Consider genetic testing

    Changes in SYNE1 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

    Arthrogryposis Multiplex Congenita Support Inc. may keep lists of experts for this condition.

Care & treatment

Care team
Bone and joint specialists (orthopedists or orthopedic surgeons); Brain and nervous system specialists (neurologists); Genetic specialists (geneticists)
Expert care
Expert lists: Arthrogryposis Multiplex Congenita Support Inc.
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 Arthrogryposis Multiplex Congenita Support Inc.
  • 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
Can genetic testing for the SYNE1 gene confirm the diagnosis?
What treatment can help with clubfoot and stiff joints?
Which therapies and aids can support movement as my child grows?

Quick facts

Symptoms usually startNewborn
InheritanceAutosomal Recessive
GenesSYNE1

It is caused by changes in the SYNE1 gene. It is autosomal recessive, so a child inherits a changed copy of the gene from each parent.

GeneticNeurological

Also known as: autosomal recessive myogenic amc; syne1 (spectrin repeat containing nuclear envelope protein 1) related arthrogryposis multiplex congenita; syne1-related amc; syne1-related arthrogryposis multiplex congenita

Patient organizations

Source: NIH GARD · Autosomal recessive myogenic arthrogryposis multiplex congenitaGARD ID 17447 · 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 Autosomal recessive myogenic arthrogryposis multiplex congenita.

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