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Living with Oromandibular-limb hypogenesis syndrome

A group of conditions with severe limb differences, mostly in the hands and feet, plus differences of the mouth, tongue, and jaw.

Understanding Oromandibular-limb hypogenesis syndrome

Oromandibular-limb hypogenesis syndromes are a group of conditions with limb differences and differences of the mouth and jaw.

The limb differences are severe, uneven from side to side, and mostly in the hands and feet. Mouth and jaw differences can include a small or missing tongue, a small jaw, tongue fused to the palate, cleft palate, and gum differences. The group includes Charlie M syndrome, Hanhart syndrome, and glossopalatine ankylosis. GARD lists newborn and infant years as the usual onset.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. Based on its summary, features may include:

  • Severe limb differences, mostly in the hands and feet
  • Small or missing tongue
  • Small jaw (micrognathia)
  • Cleft palate
  • Tongue fused to the roof of the mouth
  • Gum differences

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, ear, nose, and throat 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
Bone and joint specialists (orthopedists or orthopedic surgeons); Ear, nose, and throat specialists (otolaryngologists); 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
Which syndrome in this group does my child have?
Which specialists should plan care for the jaw, mouth, and limbs?
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 list a specific gene or how it is inherited.

Genetic

Also known as: oroacral syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Oromandibular-limb hypogenesis syndromeGARD ID 4116 · 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 Oromandibular-limb hypogenesis syndrome.

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  • Recruiting studies from ClinicalTrials.gov
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  • Eligibility is confirmed by the study team

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