Acute joint pain.
D000208:Acute Disease; D001168:Arthritis / Q000175:diagnosis* / Q000209:etiology; D001170:Arthritis, Infectious / Q000175:diagnosis; D001171:Arthritis, Juvenile / Q000175:diagnosis; D019411:Clinical Laboratory Techniques; D003937:Diagnosis, Differential; D006073:Gout / Q000175:diagnosis; D006801:Humans; D010146:Pain; D010808:Physical Examination; D012213:Rheumatic Fever / Q000175:diagnosis; D013582:Synovial Fluid / Q000032:analysis