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Living with Hennekam-Beemer syndrome

A rare syndrome present from birth that affects the skin, head size, hearing, muscles, and bones.

Understanding Hennekam-Beemer syndrome

Hennekam-Beemer syndrome is a rare condition present from birth that involves skin, hearing, muscle tone, and bones.

Features include cutaneous mastocytosis (a skin condition from too many mast cells), a small head, small or differently shaped ears, and hearing loss. People may have low muscle tone and bone differences such as curved fingers and scoliosis. Short stature and intellectual disability are also common. It starts in the newborn period or infancy.

Signs & symptoms

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

  • Small head (microcephaly)
  • Hearing loss
  • Skin color changes and itching
  • Hives and firm skin lumps
  • Small lower jaw (micrognathia)
  • Slow weight gain (failure to thrive)

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 brain and nervous system 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
Brain and nervous system specialists (neurologists); 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 tests would confirm cutaneous mastocytosis?
How often should hearing be checked?
Which specialists should be on our care team?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive

GARD says changes in genes (also called variants) cause this condition. It is autosomal recessive, so a child inherits a changed copy of the gene from each parent.

GeneticNeurological

Also known as: cutaneous mastocytosis, conductive hearing loss and microtia; mastocytosis-short stature-deafness syndrome; mastocytosis-short stature-hearing loss syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Hennekam-Beemer syndromeGARD ID 3409 · 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 Hennekam-Beemer syndrome.

Explore the Hennekam-Beemer syndrome blog

Explore research for Hennekam-Beemer syndrome

Explore actively recruiting Hennekam-Beemer syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Hennekam-Beemer syndrome with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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