Medpedia

Pectus excavatum (a Latin term meaning hollowed chest) is the most common congenital deformity of the anterior wall of the chest , in which several ribs and the sternum grow abnormally This produces a caved-in or sunken appearance of the chest. It can either be present at birth or not develop until puberty.

Pectus excavatum is sometimes considered to be cosmetic; however, depending on the severity, it can impair cardiac and respiratory function and cause pain in the chest and back. People with the abnormality may experience negative psychosocial effects, and avoid activities that expose the chest.

Pectus excavatum is sometimes referred to as cobbler's chest, sunken chest, funnel chest or simply a hole in the chest.

It's a deformity, not a defect.