title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 46-1994. A 35-year-old smoker with an air-fluid level in an upper lobe bulla.
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology*; D008297:Male; D011656:Pulmonary Emphysema / Q000473:pathology*; D012907:Smoking