Figure 21.
Reactive stress-related soft tissue changes around the sacroiliac joint. Twenty-seven-year-old professional football player. Radiograph was unremarkable. (A) On MRI, there is severe thickening of the anterior capsule (arrow) on the right side; (B) more proximally, similar though less severe capsular thickening (arrowhead) with osteoarthritis is present on the left side.