title: A 77-year-old man with a pleural effusion.
mesh_terms: D000368:Aged; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000473:pathology*; D008297:Male; D010996:Pleural Effusion / Q000473:pathology*; D010997:Pleural Neoplasms / Q000473:pathology*; D013601:T-Lymphocytes