Merck Manual

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Squamous cell carcinoma destruction and ulceration of the nose, Calico cat
Squamous cell carcinoma destruction and ulceration of the nose, Calico cat

Solar-induced lesions not treated in early stages may become very aggressive and cause ulceration and disfigurement of the nasal planum and face, as in this old Calico cat.

Courtesy of Dr. Alice Villalobos.