title: Radiological case study: cystic mass in rheumatoid arthritis.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000150:complications*; D003937:Diagnosis, Differential; D006801:Humans; D007717:Knee; D008297:Male; D008875:Middle Aged; D011859:Radiography; D013581:Synovial Cyst / Q000150:complications / Q000175:diagnosis / Q000000981:diagnostic imaging*; D013924:Thrombophlebitis / Q000175:diagnosis