Figure 9

Aneurysmal bone cyst (ABC) of the upper extremity in fibrous dysplasia. This 16 year-old girl with McCune-Albright syndrome developed pain in the left humerus. A radiograph revealed a new lytic lesion that breeched the cortex (A, arrow). MRI revealed a fluid/fluid level within the lesion consistent with an ABC (B&C). The post-surgery radiograph shows a good result with the use of grafting material and flexible intramedullary rods (D).