Sacral Stress Fracture

Causes

A sacral stress fracture can be caused by repetitive stress or weakened bones.

Risk Factors

A sacral stress fracture is more common in young athletes and older women with osteoporosis. Other things that may raise the risk are:

• Having problems that weaken the bones, such as osteoporosis
• Playing some sports, such as gymnastics or football
• Long distance running
• Weight bearing activities, such as weight lifting or military training
• Radiation therapy
• A history of Paget disease, hyperparathyroidism, osteopenia, or rheumatoid arthritis

Symptoms

The most common problem is low back pain. Other problems may be:

• Pain in hip or pelvis
• Pain in buttocks or groin
• Lower back tenderness
• Swelling at lower back
• Pain during exercise

Diagnosis

The doctor will ask about symptoms and past health. A physical exam will be done.

Pictures may be taken. This can be done with:

• X-rays
• CT scan
• MRI scan
• Bone scan

Treatment

It will take several weeks for most people to heal. The goal of treatment is to help the bones heal properly to prevent long term problems. This may include:

Support

Support can include:

• Medicine to ease pain and swelling
• A corset or brace to support the bone as it heals
• A cane or other device to allow movement with less stress on injured bones
• Exercises to help with strength and range of motion

Non-Surgical Procedures

These treatments may be done to reduce healing time by stimulating bone growth:

• Electrical stimulation—Electrical and magnetic impulses are used to stimulate enzymes to increase bone cell formation
• Extracorporeal shock wave therapy—High-energy shock waves are passed through body tissues to stimulate growth factors to increase bone cell formation
• Vertebroplasty—Small amounts of bone cement are injected into fracture lines (not common)

Surgery

Some people may need surgery when other methods do not help. Bones are reconnected and held in place with screws or a plate.

Prevention

This problem cannot always be prevented. Starting a new sport slowly may help lower the risk of injury. Healthy bones and muscles may also help. This may be done through diet and exercise.