Fig. 4From: Diagnositic value of pelvic enthesitis on MRI of the sacroiliac joints in enthesitis related arthritisEnthesitis of the left gluteus medius origin in a 15-year-old boy with arthralgias (ERA-negative according to ILAR). Semicoronal STIR MR image of the SI-joint shows edema at the origin of the gluteus medius muscle at the iliac crest representing enthesitisBack to article page