pyopneumothorax

from The Collaborative International Dictionary of English v.0.48

Pyopneumothorax \Py`op*neu`mo*tho"rax\, n. [Gr. ? pus + E.
   pneumothorax.] (Med.)
   Accumulation of air, or other gas, and of pus, in the pleural
   cavity.
   [1913 Webster]