The document discusses Hunter's Bump, which is a sacroiliac luxation where the sacrum moves out of proper position relative to the ilium. This causes a prominence of the tuber sacrale bone. A Hunter's Bump indicates underlying sacroiliac disease. Diagnosis involves musculoskeletal examination, gait analysis, and potentially a bone scan to detect inflammation before visible changes occur. Treatment typically involves rest, controlled rehabilitation, and steroid injections into the sacroiliac joint.