pectus carinatum
noun [ U ] medical specialized uk/ˌpek.təs kær.ɪˈneɪ.təm/ us/ˌpek.təs ˌker.əˈneɪ.t̬əm/
鸡胸
a deformity in which the chest is narrow and sticks out more than usual at the front
Severe cases of pectus carinatum can usually be corrected by surgery. 严重鸡胸可以通过手术矫正。
Compare: pigeon-chested