pneumohemothorax

noun

pneu·​mo·​he·​mo·​tho·​rax

variants or chiefly British pneumohaemothorax

ˌn(y)ü-mō-ˌhē-mə-ˈthō(ə)r-ˌaks, -ˈthȯ(ə)r- 

plural pneumohemothoraxes or pneumohemothoraces -ˈthōr-ə-ˌsēz, -ˈthȯr- 

: accumulation of blood and gas in the pleural cavity