stage 0 nonmelanoma skin carcinoma in situ

(... non-MEH-luh-NOH-muh skin KAR-sih-NOH-muh in SY-too) Abnormal cells are found in the squamous cell or basal cell layer of the epidermis (outer layer of skin). These abnormal cells may become cancer and spread into nearby normal tissue. Also called nonmelanoma carcinoma in situ.