The extent of aneurysmal change may determine bleeding risk. These conditions include chondrosarcoma, osteosarcoma, giant cell tumor, and aneurysmal bone cyst. The principal causes of death due to thoracic aneurysmal disease are dissection and rupture. According to Buraczewski and Dabska, the development of the aneurysmal bone cyst follows three stages. For example&colon; O04.- Embolisation Artery Aneurysmal Transluminal Percutaneous NEC (L). Aneurysmal dilatation is seen in 50% of cases at autopsy. Aneurysmal bone cysts are benign neoformations which can affect any bone. Aneurysmal bone cyst can be associated with a "TRE17"/USP6 translocation. Aneurysmal bone cysts may be intraosseous, staying inside of the bone marrow. The aneurysmal bone cyst can be treated with a variety of different methods.