Angiosarcoma signs and symptoms may vary based on where the cancer occurs. Angiosarcoma that affects the skin Most often, angiosarcoma occurs in the skin on the head and neck. It often happens on the scalp. Symptoms of this form of angiosarcoma include: 
A raised area of skin that looks like a bruise
A bruise-like lesion that grows larger over time
A lesion that may bleed when scratched or bumped
Swelling in the skin around the lesion
 Angiosarcoma that affects organs When angiosarcoma affects organs, such as the liver or the heart, it often causes pain. Other symptoms depend on the location of the angiosarcoma.