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Living with Congenitally short costocoracoid ligament

A rare condition in which a short ligament ties the shoulder blade to the first rib, limiting shoulder movement.

Understanding Congenitally short costocoracoid ligament

Congenitally short costocoracoid ligament is a rare condition in which a short ligament fixes the shoulder blade (scapula) to the first rib.

This limits how the shoulder blade can rotate or pull back, and can lead to rounded shoulders and a change in the shape of the collarbone area. It is noticed in newborns and infants. GARD notes there have been no further descriptions in the medical literature since 1989.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. Its summary mentions these:

  • Limited shoulder blade movement
  • Rounded shoulders
  • Change in the shape of the collarbone area

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 lung and breathing specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Lung and breathing specialists (pulmonologists)
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
How is this affecting my shoulder movement?
Are there therapies or other treatments that could help?
Which specialist, such as an orthopedic doctor, should I see?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Dominant

GARD lists autosomal dominant inheritance, meaning one changed copy of a gene can be enough. It doesn't name a gene.

Respiratory

Also known as: congenital short costocoracoid ligament; congenital shortness of the costocoracoid ligament; fixation of the scapula to the first rib by a congenitally short costocoracoid ligament

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Congenitally short costocoracoid ligamentGARD ID 1551 · 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 Congenitally short costocoracoid ligament.

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