THE INCREASED INCIDENCE OF ORGANIZING PNEUMONIA

Abstract
The condition known as organizing pneumonia is not commonly encountered at necropsy, and is almost never recognized in the living patient. It is characterized by the transformation of intra-alveolar exudate into connective tissue. Buhl and Delafield maintained that it represents an independent inflammatory disease of the lungs; Charcot, Coupland and Kidd that it is a phase in the evolution of lobar pneumonia. It is of greater clinical importance than is generally accorded it, partly, we believe, because it provides an anatomic basis for the otherwise vague state known as "unresolved pneumonia," and for at least some of those cases of pulmonary fibrosis which do not appear to be tuberculous and which are now frequently ascribed to syphilis, in spite of the fact that syphilis of the lungs is so rare as to constitute a pathologic curiosity. In a review of 125 cases of lobar pneumonia seen at necropsy in the

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