text: <unk><unk>  must be differentiated from other diseases causing reactive arthritis,rheumatoid arthritis and psoriatic arthritis.
option_0: Ankylosing spondylitis differential diagnosis
option_1: Bursitis differential diagnosis
option_2: Septic arthritis differential diagnosis
option_3: Psoriatic arthritis differential diagnosis
option_4: Osteomyelitis differential diagnosis
option_5: Bone or cartilage mass differential diagnosis
option_6: Sjögren's syndrome differential diagnosis
option_7: Low back pain differential diagnosis