Complete surgical removal is the treatment of choice. They can invade surrounding tissues but rarely spread to other sites. They occur most commonly in the fat under the skin. These sarcomas are typically firm, solitary tumors with irregular looping borders. Siberian Huskies, Irish Setters, German Shepherds, and mixed-breed dogs are most at risk. They occur more often in females than in males. Hemangiopericytomas develop most frequently on the lower legs and chest of older dogs. Surgical removal is effective treatment and reduces the chance of secondary infection and inflammation.
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These tumors can break the skin, cause the death of skin tissue, and drain fluid or pus. Although basal cell tumors are benign, they can be large and may cause extensive ulceration and secondary inflammation. These tumors are sometimes dark in color. They vary in size from less than 0.4 inches (1 centimeter) to more than 4 inches (10 centimeters) in diameter. The lumps may stick out like stalks from the skin surface. These tumors generally appear as firm, solitary, dome-shaped elevated masses, which are often hairless or ulcerated. These tumors are found most commonly on the head (especially the ears), the neck, and forelimbs.
Many breeds are predisposed, especially Wirehaired Pointing Griffons and Kerry Blue and Wheaten Terriers. Canine basal cell tumors most commonly develop in middle-aged to older dogs. Basal cell tumors are common in dogs and most are benign.