Actress Olivia Newton-John has announced she is suffering from breast cancer for a second time which has spread to her sacrum bone. But what is the sacrum bone and how can back pain be a sign of ...

The back pain that Newton-John originally believed to be sciatica is instead breast cancer that has metastasized to the sacrum Olivia Newton-John is putting her U.S. and Canadian tour on hold after ...

The sacrum is a bone at the back of the pelvis between the hip bones. A sacral fracture can cause symptoms including lower back and buttock pain, swelling, and reduced bowel and bladder control.