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Living with Finger hyperphalangy - toe anomalies - severe pectus excavatum syndrome

A rare genetic syndrome present from birth with short broad thumbs, toe differences, a sunken chest and distinct facial features.

Understanding Finger hyperphalangy - toe anomalies - severe pectus excavatum syndrome

Finger hyperphalangy - toe anomalies - severe pectus excavatum syndrome is a rare genetic limb syndrome present from birth.

It involves short, broad thumbs, short bent index fingers, curved fifth fingers, and broad big toes with an overlapping second toe. People also have a severely sunken chest (pectus excavatum) and facial differences. X-rays show extra bones in the thumb, index and middle fingers.

Signs & symptoms

GARD doesn't list a separate symptom list. Its summary describes:

  • Short, broad thumbs
  • Short, bent index fingers
  • Broad big toes with an overlapping second toe
  • Severe sunken chest (pectus excavatum)
  • Differences in facial features
  • Small lower jaw

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
Which specialists treat hand, foot and chest differences?
Does the sunken chest affect breathing or the heart?
Is genetic counseling available?

Quick facts

Symptoms usually startNewborn and as an Infant

Changes in genes cause it. GARD doesn't name a gene or describe how it is inherited.

Genetic

Also known as: finger hyperphalangy-toe anomalies-severe pectus excavatum syndrome; finger hyperphalangy, toe anomalies, severe pectus excavatum syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Finger hyperphalangy - toe anomalies - severe pectus excavatum syndromeGARD ID 21584 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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Perspectives from people navigating life with Finger hyperphalangy - toe anomalies - severe pectus excavatum syndrome.

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