ABSTRACT
The authors report a case of reactive arthritis that was caused by sexual contact as below example. A 36-year-old male visited our center due to sudden pain in wrist joint, the 3rd finger, knee joint, and achilles tendon. There were no specific abnormalities for the immunoserologic tests and magnetic resonance imaging; however, we found a positive test result for the polymerase chain reaction test of urine that identified Chlamydia trachomatis. Through considering the patient's medical history and various examinations, we considered the possibility of reactive arthritis, to the exclusion of alternate diagnosis. According to the our diagnosis, the patient was treated with antibiotics and nonsteroidal anti-inflammatory drugs and we found that the patient was getting better. Therefore the authors think that we have to contemplate the possibility of reactive arthritis and treat appropriately in patients with similar symptoms.