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Living with Aglossia-adactyly syndrome

A rare condition present at birth that affects the face and limbs, with a small tongue, small jaw, and missing fingers or toes.

Understanding Aglossia-adactyly syndrome

Aglossia-adactyly syndrome, also called hypoglossia-hypodactyly syndrome, is a rare condition that mainly affects the face, jaw, and limbs.

People are often born with a short, incompletely formed tongue, missing or partly missing fingers or toes, differences in the arms or legs, and a very small jaw. How much each person is affected varies a lot. Children often have some, but not all, of these features.

Signs & symptoms

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

  • Small or underdeveloped tongue
  • Small or missing fingers
  • Fused fingers (syndactyly)
  • Cleft palate
  • Underdeveloped cheekbones
  • Fewer teeth than usual (hypodontia)

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, 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); Brain and nervous system specialists (neurologists); 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 FACES: The National Craniofacial Association
  • 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 specialists, such as craniofacial and hand surgeons, should we see?
What help is available for feeding and speech?
Does this run in families, and is genetic counseling available?

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn
InheritanceAutosomal Dominant

GARD says the cause is not fully understood. It lists autosomal dominant inheritance, so a changed copy of a gene from one parent can be enough.

GeneticNeurological

Also known as: aglossia-adactylia syndrome; hanhart syndrome; hypoglossia-hypodactylia; hypoglossia-hypodactyly syndrome; jussieu syndrome; peromelia with micrognathism

Patient organizations

Source: NIH GARD · Aglossia-adactyly syndromeGARD ID 68 · 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 Aglossia-adactyly syndrome.

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