Pelvic Ring Fracture

Your pelvis is a ring — the curved bones of your hips wrap around the sides and meet in front at a joint called the pubic symphysis, and they meet in the back at two joints on either side of your tailbone. Pelvic ring fractures cover a huge spectrum. On the mild end: a small piece of bone pulled off by a muscle in a young athlete, or a slow stress crack in thinning, osteoporotic bone in an older adult. On the severe end: high-energy crashes — a fall from a roof, a serious car wreck, a major sports collision — where the whole ring breaks open, the patient bleeds heavily into the pelvis, and the injury is life-threatening.

Surgeons grade pelvic-ring fractures by how unstable the ring is. Type A is stable — the ring still holds together. Type B can twist open but doesn't shift up and down. Type C is the worst — the ring is split in a way that lets the broken half move both side-to-side and up and down. Types B and C are emergencies.

• Groin or deep pelvic pain — the pain sits deep in your hip or groin and worsens with any attempt to stand.
• Inability to bear weight — you can't stand on the injured side, or both legs feel unstable.
• Bruising across the hip or perineum — large bruises may spread over the hip creases or inner thighs within hours.
• Leg-length difference — in severe fractures the injured side may look shorter or rotated outward.
• Signs of shock (high-energy injuries) — rapid heartbeat, pale skin, dizziness, and feeling faint signal heavy internal bleeding and demand emergency care immediately.

A low-energy pelvic fracture shows up as groin or pelvic pain and the inability to put weight on the leg. A high-energy one shows up in the trauma bay as a patient who's lost a lot of blood, looks misshapen at the hips, and can't move. The first imaging is a front-on pelvic X-ray, sometimes with two extra angled views. A CT scan with contrast then maps the exact pattern and shows whether nearby blood vessels are torn.

Unstable (Type B and C) pelvic fractures need surgery to lock the ring back together. In the worst cases, an external frame is bolted on first to compress the pelvis and slow the bleeding — then a definitive surgical repair follows once the patient is stable. Operative pelvic-ring reconstruction is coordinated through a regional Level-1 trauma center in San Antonio.

External patient-education references and related OSI pages for additional background:

• Britannica — Bone disease (fractures)
• Britannica — Hip (anatomy)
• AAOS OrthoInfo — patient education library
• OSI glossary — orthopedic terminology in plain language