what is a sunken chest
Pectus excavatum (PE) is an abnormal development of the rib cage where the breastbone (sternum) caves in, resulting in a sunken chest wall deformity. Sometimes referred to as funnel chest, pectus excavatum is a deformity often present at birth (congenital) that can be mild or severe in adults and children. What causes pectus excavatum? The cause of pectus excavatum is not well understood.