What is the most common tumor found in cats?

The most common tumor found in cats is, in fact, squamous cell carcinoma. This malignancy frequently arises in areas that are exposed to sunlight, particularly in white cats or those with light-colored fur, as they are more susceptible to UV radiation. Squamous cell carcinoma presents a significant concern due to its aggressive nature and potential for local invasion.

Basal cell tumors can occur in cats but are not as prevalent as squamous cell carcinomas. They tend to be benign and slow-growing, making them less common as a major type of tumor in the feline population. Mast cell tumors and fibrosarcomas, while present in cats, are also not as frequently diagnosed as squamous cell carcinomas. Mast cell tumors can be seen in various forms but are more often linked to breeds such as the Siamese and Burmese. Fibrosarcomas, particularly associated with vaccination sites, are also significant but do not match the prevalence of squamous cell carcinoma in the general feline population.

In summary, understanding the prevalence and characteristics of squamous cell carcinoma is essential, as it represents the most commonly diagnosed tumor in cats and is known for its critical implications for treatment and outcome.