title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 21-1990. A 21-year-old man with recurrent left-sided pneumonia.
mesh_terms: D000236:Adenoma / Q000175:diagnosis; D000328:Adult; D001984:Bronchial Neoplasms / Q000175:diagnosis / Q000473:pathology*; D002277:Carcinoma / Q000175:diagnosis / Q000473:pathology*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male