Pectus excavatum is a chest-wall defect where the breastbone sinks inward, creating a “funnel” or “sunken chest.” It usually shows up in early teens and can worsen during growth spurts.

Sunken center is the hallmark. The middle of the chest caves in, especially when you stand up straight or take a deep breath.

Tenderness occurs. The depressed bone and nearby cartilage feel sore after sports or when pressed.

Posture slumps. Kids roll their shoulders forward to hide the dent, which can lead to back pain over time.

Shortness of breath shows up with activity. You puff faster than friends or feel winded during sports, even though your lungs are healthy.

Heart can race. The chest wall pushes on the heart, so you notice extra beats or a fast pulse.

Late signs include chest pain, fatigue, or self-consciousness that limits activity—an alarm that the deformity is affecting quality of life.