What is the most common form of skin cancer in cats?

Squamous cell carcinoma is recognized as the most common form of skin cancer in cats. This type of cancer primarily affects the squamous cells, which are flat cells located in the outer layer of the skin. Cats, particularly those with light-colored fur and those that are frequently exposed to sunlight, are at a higher risk for developing squamous cell carcinoma.

The pathogenesis of this cancer often involves ultraviolet (UV) radiation from sunlight leading to DNA damage in the skin cells. Exposure to UV light can result in mutations that cause the squamous cells to grow uncontrollably, ultimately leading to the formation of tumors. This is especially true for cats that have unpigmented skin or sparse fur covering areas that are more exposed to sunlight, such as the nose, ears, and eyelids.

In clinical practice, squamous cell carcinoma can present in various forms, often as non-healing lesions or ulcerated areas that may not respond to routine treatments. Timely diagnosis and intervention are critical for managing the disease effectively. The understanding that squamous cell carcinoma is the most prevalent skin tumor in cats aids in anticipating and recognizing this condition in feline patients, allowing for better prevention strategies and management of at-risk animals.