Surgical approach of posterior fossa tumor (bone aneurysmal cyst)

Abstract

An aneurysmal bone cyst is an expansible osteolytic lesion with a thin wall, containing blood-filled cystic cavities. The term aneurismal is derived from its radiographic appearance. Local hemodynamic alterations related to venous obstruction or arteriovenous fistulae that occur after an injury are important in the pathogenesis of an aneurismal bone cyst. The lesion is a component of, or arises within, a preexisting bone tumor in about one third of cases; this finding further substantiates the fact that aneurismal bone cysts occur in an abnormal bone as a result of associated hemodynamic changes. The authors would like to present a case and the problems which they had during the surgical procedures.

Keywords

• osteolytic tumor
• hemodynamic alterations
• surgical approach