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 ReviewerAnne C. Poinier, MD - Internal Medicine
Specialist Medical ReviewerC. Dale Mercer, MD, FRCSC, FACS - General Surgery
Current as ofMarch 12, 2014
WebMD Medical Reference from Healthwise