Aneurysmal bone cysts are benign bone tumors that most Medical and Ambulatory supplies / Apparel commonly occur in people younger than 30 years.The cysts are most often found in the metaphyses of long bones and rarely affect the skull.We present a 54-year-old woman with a rapidly enlarging mass in the left occipital region that caused tenderness for 2 weeks.
Computed tomography (CT) revealed an expansile, osteolytic lesion with characteristic soap-bubble appearance and fluid-fluid levels.Magnetic resonance images showed a dark rim surrounding the lesion, as well as multilocular spaces with fluid-fluid levels.The tumor was soft, fragile, and pulsatile during surgery.
The patient was treated with en bloc resection Hutch/Bookcase of the tumor with cranioplasty.Follow-up CT 5 months later showed no evidence of recurrence.[J Formos Med Assoc 2007;106(3):255-259].