Angiosarcoma is a form of cancer that develops in the blood vessels or the lining of the blood vessels. This cancer affects both adults and children; however, we do not see this cancer as often in young patients.

Angiosarcoma accounts for 2 percent of cancers, affecting close to 600 people per year in the United States. These tumors usually grow under the skin in adults, and in soft tissue or organs in children.

Angiosarcoma is not like other common tumors that develop in blood vessels, since it can spread to other parts of the body.