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Updated: Mar 16, 2026

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Published on: September 29, 2023
Atypical Pelvic Crescent Fracture Caused by Vertical Shear Force
Sang-Eun Park1, Se-Won Lee1, Weon-Yoo Kim1
1Department of Orthopedic Surgery, The Catholic University of Korea, Daejeon St. Mary's Hospital, Daejeon, Korea.
Abstract:
The crescent fracture consists of a posterior iliac wing fracture with extension into the sacroiliac joint and a dislocation of the sacroiliac joint. This fracture represents a subset of lateral compression injury. The strong posterior ligaments of sacroiliac joint remain intact and a fracture fragment (crescent shape) involving the posterior superior iliac spines remains firmly attached to the sacrum. We report a patient with atypical pelvic crescent fracture that is mainly influenced by vertical shear injury and is characterized by posterior fracture-dislocations of the sacroiliac joint. In this case report, we review the literature on classification and treatment of atypical type of crescent fracture.
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