title: Pneumoconiosis and Rheumatoid arthritis (Caplan's syndrome).
mesh_terms: D000328:Adult; D000368:Aged; D002205:Caplan Syndrome / Q000453:epidemiology / Q000276:immunology / Q000473:pathology; D003032:Coal Mining; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011859:Radiography