RT Journal A1 KLASSEN KP, ANLYAN AJ, CURTIS GM T1 BIopsy of diffuse pulmonary lesions JF Archives of Surgery JO Archives of Surgery YR 1949 FD September 1 VO 59 IS 3 SP 694 OP 704 DO 10.1001/archsurg.1949.01240040702028 UL http://dx.doi.org/10.1001/archsurg.1949.01240040702028 AB DIFFUSE, extensive, bilateral pulmonary lesions producing minimal symptoms and frequently found on routine roentgen examination present a challenging diagnostic problem. They may represent a fibrotic reaction to inhalation or radiation trauma or to infection, both bacterial and fungus; a primary pulmonary neoplasm, or metastatic lesions from asymptomatic primary carcinoma elsewhere. A presumptive diagnosis can occasionally be made on the basis of the history; examination of bronchial fluid, blood and bone marrow; sensitivity studies, or biopsy of peripheral lymph nodes. An absolute diagnosis, however, cannot be made in a large number of patients by these indirect methods. In a series of 50 patients we have been able to diagnose such lesions with certainty by the use of a simple technic of pulmonary biopsy, which in our experience has led to no serious complications and has been of minimal discomfort to the patients.SURGICAL TECHNICĀ  In the first 12 cases in which