Abstract
The aneurysmal bone cyst was first described as a pathologic entity by Jaffe and Lichtenstein in 1942. This disease is known as a non-neoplastic bone lesion, forming a cystic cavity filled with nonendotheliallined space containig blood, but the etiology remains unknown. A 13-year-old boy was referred to our hospital for treatment of mandibular fracture caused by an accident. xray showed a fracture line at the mental region of the mandible and defined multilocular cyst-like radiolucency on the left side of the mandible.
From CAG, no aneurysm was revealed, but capillaries were seen corresponding to the cyst-like shady region. Under general anesthesia, the left side of the mandible was exposed through an intraoral approach and curretted. The lesion was a multilocular cavity containing blood and coagulation.
Histologically, the cavity was lined with a thin fibrous connective tissue stroma filled with numerous capillaries and blood. In some areas, new bone formation and hemorrhage were seen. The lesion was diagnosed as an aneurysmal bone cyst.
