Fig. 1From: Diagnositic value of pelvic enthesitis on MRI of the sacroiliac joints in enthesitis related arthritisSites of entheses of the pelvis. a. Longitudinal ligament insertion (green), vertebral posterior elements (blue), anterior superior iliac spine (red), symphysis pubis (purple), iliac crest (cyan). b. Anterior superior iliac spine (red), pubic symphysis (purple), ramus of pubis (yellow), ischial tuberosity (blue), hip (light grey). c. Retroarticular ligaments (dark blue), iliac crest and wing (cyan), posterior superior iliac spine (orange)Back to article page