A rare condition of rheumatoid arthritis.
D001172:Arthritis, Rheumatoid / Q000150:complications / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008683:Metatarsophalangeal Joint / Q000000981:diagnostic imaging*; D008875:Middle Aged; D010024:Osteoporosis / Q000209:etiology; D011859:Radiography; D014033:Toe Joint / Q000000981:diagnostic imaging*