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Living with Hypertelorism, microtia, facial clefting syndrome

A very rare condition seen from birth with wide-set eyes, small ears, and cleft lip and palate.

Understanding Hypertelorism, microtia, facial clefting syndrome

Hypertelorism, microtia, facial clefting syndrome (HMC syndrome) is a very rare condition that combines wide-set eyes, small ears, and clefts.

People have hypertelorism (wide-set eyes), cleft lip and palate, and microtia (small ears). Others have a small head, hearing loss, kidney differences, short height, and developmental delay or intellectual disability. It may be seen during pregnancy or in newborns.

Signs & symptoms

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

  • Wide-set eyes (hypertelorism)
  • Small ears (microtia)
  • Cleft lip or palate
  • Hearing loss
  • Small head (microcephaly)
  • Developmental delay

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, 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.

  4. Connect with expert centers

    World Craniofacial Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Ear, nose, and throat specialists (otolaryngologists); Genetic specialists (geneticists)
Expert care
Expert lists: World Craniofacial Foundation
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 World Craniofacial Foundation and other patient organizations
  • 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
What are the options for repairing the cleft?
What hearing support is available?
Should the kidneys be checked with imaging?

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn
InheritanceAutosomal Recessive

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: bixler christian gorlin syndrome; bixler syndrome; bixler-christian-gorlin syndrome; hmc (hypertelorism, microtia, clefting) syndrome; hmc syndrome; hypertelorism with microtia and facial clefting syndrome

Patient organizations

Source: NIH GARD · Hypertelorism, microtia, facial clefting syndromeGARD ID 897 · 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 Hypertelorism, microtia, facial clefting syndrome.

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