Merck Manual

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Squamous cell carcinoma with destruction and ulceration of the nose, Calico cat
squamous-cell-carcinoma-nose-cat-villalobos-sized
Squamous cell carcinoma with destruction and ulceration of the nose, Calico cat

    Clinical photograph of a senior calico cat with squamous cell carcinoma with destruction and ulceration of the nose. Solar-induced lesions not treated in early stages may become very aggressive and cause ulceration and disfigurement of the nasal planum and face.

Courtesy of Dr. Alice Villalobos.