Simple (unicameral) bone cyst

Note the central location, slight expansion, thin but intact cortex, and scalloped endosteal margin.

Reproduced with permission from: Yochum TR, Rowe LJ. Yochum and Rowe's Essentials of Skeletal Radiology, Third Edition. Philadelphia: Lippincott Williams & Wilkins, 2004. Copyright © 2004 Lippincott Williams & Wilkins.

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