What are the long term effects of pectus?

Little lung damage: Pectus looks like it should cause a lot of problems for the lungs, but there is a much greater cosmetic problem than lung problem. Lung function tests are usually normal or very close to normal in patients considering repair of even severe pectus. If the chest deformity is part of a syndrome (or more extensive than just pectus), then under-development of the lung may also be part of the syndrome.