In dogs, hemangiosarcoma (HSA) can occur in several areas and is generally classified as visceral, dermal, or hypodermal.
Wide and early metastasis occurs commonly. The disease is often seen on the ventral skin of light-colored dogs. Sun exposure and ultraviolet radiation has been linked to the onset of disease.
Cutaneous hemangiosarcomas are uncommon skin tumors in dogs and cats, accounting for approximately 2% of all skin tumors.
Short haired, lightly pigmented breeds such as whippets, greyhounds, pointers and boxers are reported to be predisposed.
In most cases, the cause of hemangiosarcoma is unknown.
Exposure to sunlight can cause skin tumors in some dogs, especially in thinly haired regions including the belly, inner thighs, and eyelids.
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