oleothorax

noun

oleo·​tho·​rax -ˈthō(ə)r-ˌaks, -ˈthȯ(ə)r- 

plural oleothoraxes or oleothoraces -ˈthōr-ə-ˌsēz, -ˈthȯr- 

: a state in which oil is present in the pleural cavity usually as a result of injection compare pneumothorax