RT Journal A1 van Way CW, III T1 MAssive spontaneous hemothorax JF Archives of Surgery JO Archives of Surgery YR 1979 FD December 1 VO 114 IS 12 SP 1443 OP 1443 DO 10.1001/archsurg.1979.01370360097017 UL http://dx.doi.org/10.1001/archsurg.1979.01370360097017 AB Spontaneous hemothorax is uncommon. Known causes include tumor, anticoagulant therapy, arteriovenous malformations, pulmonary emboli, and tuberculosis. Spontaneous hemothorax is usually associated with spontaneous pneumothorax, although it may be isolated.1Massive bleeding is rare. The case presented here shows two unusual features. The bleeding was severe enough to produce mediastinal shift and compression of the opposite lung. The hemothorax was associated with minimal pneumothorax on admission and with no air leak.Report of a Case.—On Jan 13, 1976, a 23-year-old man began to have left pleuritic chest pain. He became fatigued, lightheaded, and short of breath. He came to the Chest roentgenogram taken in supine position on initial appearance in emergency department. Trachea and mediastinum were forced over by massive hemothorax on left side. There is a small amount of air noticeable in left lower chest but almost entire chest is occupied by blood.Emergency Department of Colorado General