pectus excavatum
noun [ U ] medical specialized uk/ˌpek.təs eks.kəˈveɪ.təm/ us/ˌpek.təs ˌeks.kəˈveɪ.t̬əm/ (also funnel chest)
凹陷胸，漏斗胸
a deformity in which the chest goes in more than usual at the front
Pectus excavatum can cause difficulties when exercising. 凹陷胸可能会对运动造成困难。