It is our purpose in this paper to report 2 cases in which total pneumonectomy was performed and to call attention to factors which may make for better results in the performance of an often difficult operation. REPORT OF CASES Case 1. —D. C., a white man aged 42, a manual laborer and plumber, was admitted to the service of Dr. S. A. Lowenberg on May 4, 1936. The chief complaint was sharp pains in the lower part of the chest, on the left side. The patient had been well until two and one-half months before his admission to the hospital, when the pains referred to were noted. These were accompanied by cough, especially in the morning, productive of small amounts of foul-smelling and foultasting blood-tinged sputum. In the past eight weeks he had lost 24 pounds (10.9 Kg.). Night sweats had been present for three weeks. Dyspnea and palpitation