Simple bone cyst with pathological fracture
12 Y/O female with minor trauma
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Simple bone cyst at proximal of left humerus with pathological fracture.
Features are consistent of simple bone cyst with pathological fracture.
Solitary bone cysts ( also called simple bone cysts or unicameral bone cysts) is the only lesion in the mnemonic FEGNOMASHIC that is always central in location and a solitary bone cyst can be excluded if it is not.
Simple bone cysts are usually asymptomatic unless fractured. A classic radiographic finding for a solitary bone cyst is the fallen fragment sign which occurs when a piece of cortex breaks off after a fracture in a simple bone cyst, and the piece of cortical bone sinks to the gravity-dependent portion of the lesion.