Most animals are susceptible to developing cancer at some point in their lives. Among all types of cancer, squamous cell carcinoma is one of the skin cancers that commonly affects pets. Cutaneous squamous cell carcinoma is a type of cancer caused by neoplasms arising from the squamous epithelium of an animal regardless of species. However, this essay will only focus on this condition of felines since the species I chose is a white cat called Rosie. There are several forms of cutaneous squamous cell carcinoma among felines, known as solar keratosis, and multicentric squamous cell carcinoma in situ, sometimes known as Bowen's-like disease, but in this case Rosie is diagnosed with the disease. The presentation of squamous cell carcinoma varies depending on the stages of the cancer, the types of lesions, and the underlying causes of the neoplasm. Felines with squamous cell carcinoma typically present with lesions, erosions, crusting of epithelial cells, ulcerations, and sometimes necrosis in severe conditions. In the initial stages, the cat would develop hyperplastic lesions and inflammation around the affected area. It will appear erythematous and slightly crusty or scaly. Over time, the signs worsen where the lesions become proliferative and have the appearance of cauliflower-like masses. They are often ulcerated and have crusted lesions. Unfortunately, he bleeds easily when traumatized. The favored areas of tumors are usually the nose, eyelids and auricles where there is a lack of pigmentation. There are several causes that contribute to cutaneous squamous cell carcinoma (SCC), mainly prolonged exposure to sunlight, the presence of trauma, exposure to carcinogen and affected by papillomavirus.[...... half of the document. .....with photodynamic therapy. Neoplastic tissues would absorb compounds of photosensitizing agents and the interaction of light with the photosensitizing agent ultimately leads to the production of cytotoxic free rootlets [secret]. The advantage of this treatment is that multiple lesions can be treated although this may require more than one treatment. The disadvantage of this treatment, however, is that it is limited only to superficial tumors. Patients might also acquire side effects such as photosensitization for about 4-6 weeks or tissue necrosis that sloughs off after some time. [Secret] This latter effect would induce pain in patients. Cancers treated in the early stages have a greater chance of healing. In addition to this, well-differentiated and superficial lesions also have a better prognosis.