vertebral hemangioma definition
Vertebral hemangiomas are benign, malformative vascular tumours composed of newly formed blood vessels with normal (capillary, venous, or veno-capillary) structure and without arterio-venous shunt; they involve firstly the vertebra and may secondary extend to the epidural space.avernous angiomas are composed of large dilated blood vessels closely clustered together, so that they are not separated by normal bone tissue. Capillary angiomas are formed of thin-walled capillary vessels of various sizes separated by normal bone tissue.