Pectus carinatum is present when the chest protrudes over the sternum. It is often described as giving the person a bird-like appearance.

Alternative Names

Pigeon breast; Pigeon chest


Pectus carinatum may occur alone or along with other genetic disorders or syndromes. The condition causes the sternum to protrude. There is a narrow depression along the sides of the chest. This gives the chest a bowed-out appearance similar to that of a pigeon.

People with pectus carinatum generally develop a normal heart and lungs. However, the deformity may prevent these from functioning as well as they could. There is some evidence that pectus carinatum may prevent complete emptying of air from the lungs in children. These young people may have less stamina, even if they do not recognize it.

Pectus deformities can also have an impact on a child's self image. Some children live happily with pectus carinatum. For others, the shape of the chest can damage their self-image and self-confidence. These feelings may interfere with forming connections to others.


Causes may include:

  • Congenital pectus carinatum (present at birth)
  • Trisomy 18
  • Trisomy 21
  • Homocystinuria
  • Marfan syndrome
  • Morquio syndrome
  • Multiple lentigines syndrome
  • Osteogenesis imperfecta

Home Care

No specific home care is needed for this condition.

When to Contact a Medical Professional

Call your health care provider if you notice that your child's chest seems abnormal in shape.

What to Expect at Your Office Visit

The provider will perform a physical exam and ask questions about the child's medical history and symptoms. Questions may include:

  • When did you first notice this? Was it present at birth, or did it develop as the child grew?
  • Is it getting better, worse, or staying the same?
  • What other symptoms are present?

Tests that may be done include:

  • Lung function testing to measure how well the heart and lungs are performing
  • Lab tests such as chromosome studies, enzyme assays, x-rays, or metabolic studies

A brace may be used to treat children and young adolescents. Surgery is sometimes done. Some people have gained improved exercise ability and better lung function after surgery.


Boas SR. Skeletal diseases influencing pulmonary function. In: Kliegman RM, Stanton BF, St Geme JW III, Schor NF, eds. Nelson Textbook of Pediatrics. 20th ed. Philadelphia, PA: Elsevier; 2016:chap 417.

Version Info

  • Last reviewed on 7/10/2015
  • Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

ADAM QualityA.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission ( URAC's accreditation program is the first of its kind, requiring compliance with 53 standards of quality and accountability, verified by independent audit. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial process. A.D.A.M. is also a founding member of Hi-Ethics ( and subscribes to the principles of the Health on the Net Foundation (

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright 2002 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

Share This Page: