• On gross examination,   hemangiomas are cystic, dark   red cavities. The lesion is   well demarcated and has   trabecular thickening.

• Under the microscope, there   are four types of   hemangiomas: capillary,   cavernous, arteriovenous, and   venous. Capillary and   cavernous lesions are the   most common in bone.

• Treatment includes radiation,   surgical excision,   embolization.