In a six-year period(1988. 5-1994. 4), fine needle aspiration cytology(FNAC) of 322 pulmonary lesions from 296 patients were performed at Soonchunhyang University Hospital, Of these 322, malignancy was diagnosed cytologically in
139(43.2%),
suspicious malignancy in 7(2.2%), negative in 164(50.8%), and insufficient material in 12(3.8%), Malignant lesions consisted of 54 cases of adenocarcinoma, 50 cases of squamous cell carcinoma, 18 cases of small cell carcinoma. They
were
verified by histologic examination in 70 cases, There were 2(0.6%) false positive cases due to florid bronchoalveolar hyperplasia and atypical bronchial epithelial cells associated with granulomatous lesion. The overall accuracy rate was
90%,
the
sensitivity 84.3% and the specificity 94.7%.
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