Angiosarcoma may be a rare sort of cancer that forms within the lining of the blood vessels and lymph vessels. Your lymph vessels, which are a part of your system , collect bacteria, viruses and waste products from your body and eliminate them. Signs and symptoms of this type of angiosarcoma include: A raised, purplish area of skin that appears sort of a bruise, A bruise-like lesion that grows larger over time, A lesion which will bleed when scratched or bumped, Swelling within the surrounding skin. When angiosarcoma affects organs, like the liver or the guts , it often causes pain. Other symptoms depend upon the situation of the angiosarcoma.