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Living with Trigonocephaly-bifid nose-acral anomalies syndrome

A rare condition present at birth that affects the shape of the head and face, and the hands and feet.

Understanding Trigonocephaly-bifid nose-acral anomalies syndrome

Trigonocephaly-bifid nose-acral anomalies syndrome is a rare condition present from birth that affects the shape of the head and face and the hands and feet.

Features include a narrow forehead, upward-slanting eyes, a wide nose with a slightly split tip, a wide mouth with a thin upper lip, and a small jaw. Hands and feet show broad thumbs, large toes, and bulbous fingertips with short nails. People are often shorter than average and may have weak muscles and trouble with movement and learning.

Signs & symptoms

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

  • Narrow forehead (trigonocephaly)
  • Wide nose with a slightly split tip
  • Small jaw
  • Broad thumbs and large toes
  • Short stature
  • Weak muscles and learning problems

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 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
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?
Which specialists should be on a craniofacial care team?
What therapies could help with movement and learning?

Quick facts

Symptoms usually startNewborn and as an Infant

GARD says changes in genes (variants) cause this condition, but it doesn't name a specific gene.

Genetic

Also known as: trigonobrachycephaly, bulbous bifid nose, micrognathia, and abnormalities of the hands and feet

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Trigonocephaly-bifid nose-acral anomalies syndromeGARD ID 5126 · 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 Trigonocephaly-bifid nose-acral anomalies syndrome.

Explore the Trigonocephaly-bifid nose-acral anomalies syndrome blog

Explore research for Trigonocephaly-bifid nose-acral anomalies syndrome

Explore actively recruiting Trigonocephaly-bifid nose-acral anomalies syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Trigonocephaly-bifid nose-acral anomalies syndrome with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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