title: Cytologic diagnosis of occult small-cell undifferentiated carcinoma of the lung.
abstract: Small-cell undifferentiated carcinoma of the lung is usually metastatic and/or locally advanced at diagnosis. We describe an occult tumor that cytologic techniques diagnosed in a minimally symptomatic, high-risk individual. Despite the absence of radiologic or histopathologic confirmation, bronchoscopically directed cytologic specimens localized the lesion. A tiny, apparently stage I, small-cell undifferentiated carcinoma was successfully resected.
mesh_terms: D018288:Carcinoma, Small Cell / Q000175:diagnosis* / Q000473:pathology / Q000628:therapy; D003581:Cytodiagnosis; D005500:Follow-Up Studies; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000628:therapy; D008297:Male; D008875:Middle Aged; D012907:Smoking