Abstract

IT IS the purpose of this paper to present 100 consecutive, unselected cases of spontaneous pneumothorax in patients admitted to the Boston City Hospital in a nine-year period between 1934 and 1943. During the same period approximately 375,000 patients were admitted to the hospital, giving an incidence of 0.027 per cent, a figure that coincides with that of the series of Cohen and Kinsman.1 DiagnosisThe diagnosis in each case was made on the basis of the history, physical signs and x-ray findings. Positive x-ray findings were considered essential, and the diagnosis was not made in their absence.The patients . . .

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