chylopneumothorax

noun

chy·​lo·​pneu·​mo·​tho·​rax -ˌn(y)ü-mə-ˈthō(ə)r-ˌaks, -ˈthȯ(ə)r- 

plural chylopneumothoraxes or chylopneumothoraces -ˈthōr-ə-ˌsēz, -ˈthȯr- 

: the presence of air and chyle in the pleural cavity