BACK TOTOP Browse A-ZSearchBrowse A-ZABCDEFGHIJKLMNOPQRSTUVWXYZ0-9 E-mail FormEmail ResultsName:Email address:Recipients Name:Recipients address:Message: Print-FriendlyBookmarksbookmarks-menuPectus carinatumPigeon breast; Pigeon chestPectus carinatum is present when the chest protrudes over the sternum. It is often described as giving the person a bird-like appearance. Considerations 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 Causes may include:Congenital pectus carinatum (present at birth) Trisomy 18 Trisomy 18Trisomy 18 is a genetic disorder in which a person has a third copy of material from chromosome 18, instead of the usual 2 copies. Rarely, the extra...ImageRead Article Now Book Mark Article Trisomy 21 Homocystinuria HomocystinuriaHomocystinuria is a genetic disorder that affects the metabolism of the amino acid methionine. Amino acids are the building blocks of life.ImageRead Article Now Book Mark Article Marfan syndrome Marfan syndromeMarfan syndrome is a disorder of connective tissue. This is the tissue that strengthens the body's structures. Disorders of connective tissue affect...ImageRead Article Now Book Mark Article Morquio syndrome Morquio syndromeMucopolysaccharidosis type IV (MPS IV) is a rare disease in which the body is missing or does not have enough of an enzyme needed to break down long ...Read Article Now Book Mark Article Multiple lentigines syndrome Multiple lentigines syndromeNoonan syndrome with multiple lentigines (NSML) is a very rare inherited disorder. People with this condition have problems with the skin, head and ...Read Article Now Book Mark Article Osteogenesis imperfectaOsteogenesis imperfectaOsteogenesis imperfecta is a condition causing extremely fragile bones.ImageRead Article Now Book Mark Article In many cases the cause is unknown. 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 Lung function testingPulmonary function tests are a group of tests that measure breathing and how well the lungs are functioning.ImageRead Article Now Book Mark Article Lab tests such as chromosome studies, enzyme assays, x-rays, or metabolic studiesA 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.Open ReferencesReferencesBoas SR. Skeletal diseases influencing pulmonary function. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 445.Gottlieb LJ, Reid RR, Slidell MB. Pediatric chest and trunk defects. In: Rodriguez ED, Losee JE, Neligan PC, eds. Plastic Surgery: Volume 3: Craniofacial, Head and Neck Surgery and Pediatric Plastic Surgery. 4th ed. Philadelphia, PA: Elsevier; 2018:chap 40.Kelly RE, Martinez-Ferro M. Chest wall deformities. In: Holcomb GW, Murphy JP, St. Peter SD eds. Ashcraft's Pediatric Surgery. 7th ed. Philadelphia, PA: Elsevier; 2020:chap 20.AllVideoImagesTogRibcage - illustration The ribs connect on the front of the chest with the long flat sternum, or breast bone, and on the back with the vertebral column, creating a cage of protection for the lungs and heart.RibcageillustrationBowed chest (pigeon breast) - illustration A bowed chest is also called pectus carinatum. It is a protrusion of the chest over the sternum often described as bird-like. Pectus carinatum is usually only a cosmetic defect but can be associated with other genetic diseases.Bowed chest (pigeon breast)illustrationRibcage - illustration The ribs connect on the front of the chest with the long flat sternum, or breast bone, and on the back with the vertebral column, creating a cage of protection for the lungs and heart.RibcageillustrationBowed chest (pigeon breast) - illustration A bowed chest is also called pectus carinatum. It is a protrusion of the chest over the sternum often described as bird-like. Pectus carinatum is usually only a cosmetic defect but can be associated with other genetic diseases.Bowed chest (pigeon breast)illustrationRelated Information Review Date: 8/10/2021 Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- © 1997- All rights reserved. A.D.A.M. content is best viewed in IE9 or above, Firefox and Google Chrome browser.Content is best viewed in IE9 or above, Firefox and Google Chrome browser.