A condition in which the breastbone is sunken into the chest.

Pectus excavatum often can be seen shortly after birth. Its exact cause isn't clear. When the condition is serious, it can affect how well the heart and lungs work over time.

Pectus excavatum can affect more than the appearance of the chest. It also can cause symptoms such as shortness of breath, chest pain, and a fast-beating, fluttering or pounding heart.

Pectus excavatum treatments include physical therapy, medical devices and surgery. Surgery is mainly for people who have moderate to serious symptoms.