RT Book, Section A1 Barlotta, Kevin S. A1 Stack, Lawrence B. A1 Knoop, Kevin J. A2 Knoop, Kevin J. A2 Stack, Lawrence B. A2 Storrow, Alan B. A2 Thurman, R. Jason SR Print(0) ID 1176323162 T1 Pectus Deformities T2 The Atlas of Emergency Medicine, 5e YR 2021 FD 2021 PB McGraw-Hill PP New York, NY SN 9781260134940 LK accessmedicine.mhmedical.com/content.aspx?aid=1176323162 RD 2021/04/22 AB Pectus excavatum is a common developmental deformity of the anterior chest wall present in 0.25% of births. The cause is not well understood and may be related to intrauterine growth defects or muscle and connective tissue abnormalities within the thorax. In many cases, there is a family history of the condition.