Bull Terrier

Mast cell tumors are a malignant tumor that originate in the dermal layer of the skin. These tumors can arise from any area of the body, and may have a variety of appearances.

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Single to multiple raised, hairless, lobulated white to pale pink skin or sometimes pigmented skin masses which may ooze an oily white material. Masses range in size from ¼” – 1” in diameter.

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Affected skin is reddened, scaly, and may lose hair. With continued sun exposure thickened skin, red bumps, plaques, and nodules develop which may become ulcerated and crusty.

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Lesions occur most commonly on the trunk, the legs, the digits (toe), the scrotum, the lips, the anus, and the nose. The lesions are typically ulcerated or cauliflower-like in appearance, bleed easily and are typically solitary.

• Read more about Squamous Cell Carcinoma