title: Ewing's-like sarcoma appearing as a primary pulmonary neoplasm.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis*; D008297:Male; D012512:Sarcoma, Ewing / Q000175:diagnosis* / Q000473:pathology / Q000648:ultrastructure