Fig. 6From: Diagnositic value of pelvic enthesitis on MRI of the sacroiliac joints in enthesitis related arthritisEnthesitis of the left external obturator muscle in a 14-year-old boy with enthesitis-related arthritis. Axial STIR image shows high signal intensity in the left external obturator muscle (arrow), representing hip enthesitis. Note also some fluid in the left hip joint (short arrows)Back to article page