title: Oat cell carcinoma mimicking leukemia.
abstract: A patient with oat cell carcinoma had circulating carcinoma cells, which initially suggested a diagnosis of acute leukemia. The correct diagnosis was made only by histopathologic examination of the bone marrow. A case of a similar bone marrow disorder, which developed after diagnosis of oat cell carcinoma, is also presented.
mesh_terms: D001856:Bone Marrow Examination; D018288:Carcinoma, Small Cell / Q000097:blood / Q000175:diagnosis* / Q000473:pathology; D003937:Diagnosis, Differential; D006801:Humans; D007938:Leukemia / Q000175:diagnosis*; D008175:Lung Neoplasms / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D009360:Neoplastic Cells, Circulating