Reiter's syndrome and psoriatic arthritis. Their roentgen spectra and some interesting similarities.
D000842:Ankle / Q000000981:diagnostic imaging; D001168:Arthritis / Q000150:complications / Q000000981:diagnostic imaging*; D016918:Arthritis, Reactive / Q000000981:diagnostic imaging*; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D005385:Fingers / Q000000981:diagnostic imaging; D005528:Foot / Q000000981:diagnostic imaging; D006225:Hand / Q000000981:diagnostic imaging; D006801:Humans; D007717:Knee / Q000000981:diagnostic imaging; D011565:Psoriasis / Q000150:complications*; D011859:Radiography; D012446:Sacroiliac Joint / Q000000981:diagnostic imaging; D014034:Toes / Q000000981:diagnostic imaging