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Living with Acromelic frontonasal dysostosis

A rare condition present at birth with facial, brain, and limb differences and intellectual disability.

Understanding Acromelic frontonasal dysostosis

Acromelic frontonasal dysostosis is a rare condition with a differently shaped face and nose, brain differences, and limb differences.

Facial features include wide-set eyes, a split nasal tip, nasal clefting, a short, broad head, and a cleft in the middle of the face. Brain differences include a missing corpus callosum. Limbs may have shin bone differences, clubfoot, and extra great toes. People have intellectual disability. GARD lists onset as during pregnancy and as a newborn.

Signs & symptoms

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

  • Global developmental delay
  • Intellectual disability
  • Missing corpus callosum in the brain
  • Cleft in the middle of the face or nose
  • Clubfoot
  • Extra toes (polydactyly)

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 and genetic specialists.

  3. Consider genetic testing

    Changes in ZSWIM6 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

Care & treatment

Care team
Bone and joint specialists (orthopedists or orthopedic surgeons); 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 specialists should follow brain and craniofacial care?
Does my child need surgery for facial or foot differences?
What does ZSWIM6 genetic testing mean for our family?

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn
InheritanceAutosomal Dominant
GenesZSWIM6

Changes in the ZSWIM6 gene cause this condition. It is autosomal dominant, so one changed copy of the gene is enough.

GeneticNeurological

Also known as: acromelic frontonasal dysplasia; afnd; toriello syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Acromelic frontonasal dysostosisGARD ID 5539 · 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 Acromelic frontonasal dysostosis.

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