Cavernous hemangioma, a vascular tumor composed of large dilated blood vessels and containing large blood-filled spaces, due to dilation and thickening of the walls of the capillary loops. Also called cavernous angioma.

A vascular tumor preponderantly composed of large dilated blood vessels, often containing large amounts of blood, occurring in the skin, subcutaneously, or both, and also in many viscera, particularly the liver, spleen, pancreas, and sometimes the brain.

Most are present in early life but they are usually not present at birth. The typical superficial lesions are bright to dark red in color; deep lesions have a blue color.