Squamous Cell Carcinoma

21.3.4 Squamous Cell Carcinoma Squamous cell carcinomas are one of the most common skin tumors. In cattle, they tend to occur around the eye, particularly where the hair is white in color, and can completely deform/destroy the eye, or the area around the eye. In horses, this cancer tends to occur around the eye or genital tract (vulva in mares and penis in stallions/geldings), and progress slowly. There is no effective treatment, although surgical removal of the affected area may help. In cattle, the affected eye is often removed and the animal can continue to produce milk or reproduce for an extended period.