During the last few months we have had the opportunity of studying roentgenologically the course of four cases of postinfluenzal pyopneumothorax, and we believe that the pathologic pictures obtained during these studies are worthy of report.
These patients have all been treated as conservatively as possible and in only one case was recourse had to a radical surgical procedure.
All roentgenograms were stereoscopic. They were made with a hydrogen tube, with a 33-inch target-plate distance. The patients were in the erect position and both exposures were made during one inspiration.
REPORT OF CASES
Case 1 (No. 1948).—History.—A man, J. S., aged 18, entered the hospital Jan. 27, 1919, complaining of severe, stabbing pain in the right chest. Two years before, he had had an attack of pleurisy which lasted five days. In November,1918,he had sharp, stabbing, inspiratory pain in the lower right chest, and for three weeks following,