[Considerations on the problem of Caplan's syndrome].
D001168:Arthritis; D001172:Arthritis, Rheumatoid / Q000000981:diagnostic imaging*; D002205:Caplan Syndrome; D006801:Humans; D011859:Radiography; D012829:Silicosis / Q000000981:diagnostic imaging*
ARTHRITIS, RHEUMATOID/radiography; SILICOSIS/radiography