Sacral fracture classification

From: Fitzgibbon D. Assessment and diagnosis of the cancer patient with pain. In: Bonica's Management of Pain, 5^th ed, Ballantyne JC, Fishman SM, Rathmell JP (Eds), Lippincott Williams & Wilkins, 2018. Copyright © 2018. Reproduced with permission from Wolters Kluwer Health. Unauthorized reproduction of this material is prohibited.