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Living with Lethal faciocardiomelic dysplasia

An extremely rare inherited condition with differences in the face, heart, arms, and legs, reported in one family.

Understanding Lethal faciocardiomelic dysplasia

Lethal faciocardiomelic dysplasia is an extremely rare condition with multiple birth differences in the face, heart, and limbs.

It was described only once, in 1975, in three affected males in a family of 13 children whose parents were second cousins. Babies had low birth weight, a small mouth, jaw, and tongue, underdeveloped forearm and lower leg bones, and a severe left heart difference.

Signs & symptoms

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

  • Small jaw and chin (microretrognathia)
  • Small mouth and tongue
  • Underdeveloped forearm bones
  • Short thumb and fifth finger
  • Short shinbone and calf bone
  • Underdeveloped left side of the heart

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 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); 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
Would genetic testing help find the cause for our family?
Which specialists should evaluate the heart and limbs?
What genetic counseling is available for future pregnancies?

Quick facts

Symptoms usually startNewborn
InheritanceAutosomal Recessive

GARD lists it as autosomal recessive, which means a child inherits a changed copy of the gene from each parent. GARD does not name a gene.

Genetic

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Lethal faciocardiomelic dysplasiaGARD ID 2229 · 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 Lethal faciocardiomelic dysplasia.

Explore the Lethal faciocardiomelic dysplasia blog

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