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Living with Arthrogryposis multiplex congenita 2, neurogenic type

A condition present from birth with stiff, fixed joints and weak muscles caused by nerve cell development differences.

Understanding Arthrogryposis multiplex congenita 2, neurogenic type

Arthrogryposis multiplex congenita 2, neurogenic type (AMCN) is a condition in which multiple joints are fixed in a bent position from before birth.

Joints such as the wrists, elbows, fingers, knees, ankles, and hips may be affected. It occurs because of unusual development of nerve cells in the spinal cord or brainstem. It often occurs in a person with no family history, though families with several affected members have been reported. In most cases the genetic cause is unknown.

Signs & symptoms

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

  • Joints stuck in a bent position (flexion contractures)
  • Weak arm and leg muscles
  • Muscle wasting
  • No tendon reflexes
  • Stiff wrists, elbows, knees, and ankles

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 and genetic specialists.

  3. Consider genetic testing

    Changes in ERGIC1 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); 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
Would genetic testing, including ERGIC1, help in our case?
How can therapy help joint movement and muscle strength?
Should breathing muscle strength be checked?

Quick facts

Symptoms usually startNewborn
InheritanceAutosomal Recessive
GenesERGIC1

GARD lists the ERGIC1 gene and autosomal recessive inheritance. It says it often occurs with no family history and that in most cases the genetic cause remains unknown.

Genetic

Also known as: amc neurogenic type; amc, neurogenic type; amc2; amcn; arthrogryposis multiplex congenita neurogenic type; neurogenic arthrogryposis multiplex congenita

Patient organizations

Source: NIH GARD · Arthrogryposis multiplex congenita 2, neurogenic typeGARD ID 790 · 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 Arthrogryposis multiplex congenita 2, neurogenic type.

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