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Living with Contractures - webbed neck - micrognathia - hypoplastic nipples syndrome

An extremely rare syndrome with a small jaw, a short webbed neck, small nipples, and tight knees and elbows that ease over time.

Understanding Contractures - webbed neck - micrognathia - hypoplastic nipples syndrome

Contractures-webbed neck-micrognathia-hypoplastic nipples syndrome is an extremely rare syndrome present from birth.

It includes a small jaw (micrognathia), a short, webbed neck, underdeveloped nipples, and tight joints (contractures) in the knees and elbows that improve over time. People may also have sloping shoulders, mild to moderate hearing loss, mild speech problems, and certain facial features, like wide-set eyes. It is noticed in newborns and infants.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. Its summary mentions these:

  • Small jaw (micrognathia)
  • Short, webbed neck
  • Underdeveloped nipples
  • Tight knees and elbows that improve over time
  • Hearing loss
  • Mild speech problems

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 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
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 rare disease patient organizations for support
  • 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
How should hearing be tested and followed?
What therapy can help with joints and speech?
Would genetic testing help our family?

Quick facts

Symptoms usually startNewborn and as an Infant

GARD says changes in genes cause this condition. It doesn't name a gene.

Genetic

Also known as: contractures-webbed neck-micrognathia-hypoplastic nipples syndrome; contractures, webbed neck, micrognathia, hypoplastic nipples syndrome; dinno syndrome; joint contracture, webbed neck, micrognathia, hypoplastic nipple syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Contractures - webbed neck - micrognathia - hypoplastic nipples syndromeGARD ID 21364 · 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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