Aneurysmal Bone Cyst eMedicine

Description: Introduction Differentials Radiograph CT Scan MRI Ultrasound Nuclear Medicine Angiography Intervention Bibliography Background: An aneurysmal bone cyst is an expansile osteolytic lesion with a thin wall, containing blood-filled cystic cavities. The term aneurysmal is derived from its radiographic appearance. Pathophysiology: Trauma is considered an initiating factor in the pathogenesis of some cysts in well-documented cases involving acute fracture. Local hemodynamic alterations related to venous obstruction or arteriovenous fistulae that occur after an injury are important in the pathogenesis of an aneurysmal bone cyst. Author: Mahesh Kumar Neelala Anand, MBBS, DNB, FRCR, Consulting Staff, Department of Radiology, Pennine Acute Hospitals NHS Trust, Royal Oldham Hospital, Manchester, UK Coauthor(s): Eric A Wang, MD, Consulting Staff, Department of Radiology, Carolinas Medical Center 2004