title: Coal dust deposition--rare cause of "black esophagus".
authors.forename: H A
authors.initials: HA
authors.lastname: Khan
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003031:Coal; D004391:Dust; D004947:Esophagus / Q000473:pathology*; D006801:Humans; D008297:Male; D011009:Pneumoconiosis / Q000150:complications
chemical_list: D003031:Coal; D004391:Dust