IS case 486: Simple bone cyst
Imaging Sciences URMC 2010
Publication Date: 2010-08-30
Simple bone cyst is a tumor-like lesion of unknown etiology, which is attributed to a local disturbance of bone growth. They are most commonly seen by 20 years of age and in the proximal diaphysis of the humerus and femur. On a radiograph, simple bone cysts appear as radiolucent, centrally located, well-circumscribed lesion with sclerotic margins. They usually do not have any periosteal reaction, unless there is a pathological fracture. The most common complication is pathologic fracture. Often a fallen fragment can been seen within the cyst which is none other than a fractured piece of cortex. Other atypical locations include the calcaneus, talus, and iliac bone.
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