A 28-year-old female pedestrian is struck by a vehicle, sustaining a lateral compression Type II pelvic fracture (LC-II). This characteristically includes:

• A Pubic symphysis diastasis with anterior SI joint opening
• B Vertical shear of the entire hemipelvis
• C Ipsilateral anterior ring fracture with posterior SI joint compression and crescent (iliac) fracture ✓
• D Bilateral pubic rami fractures without posterior injury

Explanation

Young-Burgess lateral compression (LC) classification: LC-I = ipsilateral pubic rami fractures + sacral compression fracture; LC-II = ipsilateral pubic rami + posterior iliac crescent (bucket handle) fracture through the posterior SI joint (partially stable); LC-III = LC-II pattern on ipsilateral side with contralateral open-book pattern. The crescent fracture in LC-II is an impacted posterior iliac wing fracture through the SI joint, causing internal rotation of the hemipelvis. This differs from APC (open-book) which involves external rotation forces.

Reference: Maheshwari Essential Orthopaedics, 6th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.