General Considerations
•benign tumor arising from basal cells of the epidermis, hair follicles, or sweat or sebaceous glands
•basal cell carcinomas may be induced by ultraviolet radiation
•basal cell carcinomas account for 4%-12% of canine skin tumors
•mean age 6-9 years
•breed predisposition: Cocker Spaniel
•sites: head, neck, and shoulders
•gross appearance: solitary, well-circumscribed, freely movable, and pigmented, solid, or cystic ± ulcerated in cats
•metastasis is rare but local tumor recurrence after incomplete excision is possible
•treatment: surgery or cryosurgery (if < 1 cm)
•prognosis: excellent
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BASAL CELL CARCINOMA