Aneurysmal Bone Cyst: pseudocyst, does not have epithelium-lined lumen. benign lesion blood filled. trauma, possible genetic component. Charact: expansile, thin peripheral bone that is blood filled, with bruit, thrill, pulse pressure. a vascular type lesion has a pulse sensation, if sensation is present then a change in diagnosis is needed. Dental: may cause teeth to be displaced or loose because of bone expansion. Treat: excision and curettage, cryotherapy, sclerotherapy, radionuclide ablation, en bloc resection.