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Living with Macular coloboma-cleft palate-hallux valgus syndrome

A rare genetic syndrome from birth with an eye difference, a cleft palate, and a turned big toe.

Understanding Macular coloboma-cleft palate-hallux valgus syndrome

Macular coloboma-cleft palate-hallux valgus syndrome is a rare genetic syndrome that combines an eye difference, a cleft palate, and a big toe that bends toward the other toes.

People have a gap in the back of the eye (macular coloboma) on both sides, a cleft palate, and a bent big toe (hallux valgus). Differences of the pelvis, limbs, and fingers or toes were also reported. It is present from birth.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet, but its summary describes these:

  • Gap in the back of both eyes (macular coloboma)
  • Cleft palate
  • Big toe bending toward the other toes (hallux valgus)
  • Pelvis differences
  • Limb and finger or toe 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 ear, nose, and throat specialists, eye disease 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
Ear, nose, and throat specialists (otolaryngologists); Eye disease specialists (ophthalmologists); 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 can be done for vision with a macular coloboma?
Which specialists should treat the cleft palate and the feet?
What are the chances of this happening again in our family?

Quick facts

Symptoms usually startNewborn
InheritanceAutosomal Recessive

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

Genetic

Also known as: coloboma of macula and skeletal anomalies

Patient organizations

Source: NIH GARD · Macular coloboma-cleft palate-hallux valgus syndromeGARD ID 16802 · 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 Macular coloboma-cleft palate-hallux valgus syndrome.

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