The sacrum is a large triangular bone at the bottom of the spine. It is inserted like a wedge between the two hipbones.
The sacrum is shorter and wider in women than in men.
|Primary Medical Reviewer||Anne C. Poinier, MD - Internal Medicine|
|Specialist Medical Reviewer||C. Dale Mercer, MD, FRCSC, FACS - General Surgery|
|Last Revised||November 15, 2011|
WebMD Medical Reference from Healthwise