RT Book, Section A1 Wolff, Klaus A1 Johnson, Richard Allen A1 Saavedra, Arturo P. A1 Roh, Ellen K. SR Print(0) ID 1140790245 T1 PRECANCEROUS LESIONS AND CUTANEOUS CARCINOMAS T2 Fitzpatrick's Color Atlas and Synopsis of Clinical Dermatology, 8e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9781259642197 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1140790245 RD 2024/04/19 AB Cutaneous epithelial cancers [nonmelanoma skin cancer (NMSC)] originate most commonly in the epidermal germinative keratinocytes or adnexal structures. The two principal NMSCs are basal cell carcinoma (BCC) and squamous cell carcinoma (SCC). SCC often has its origin in an identifiable in situ lesion that can be treated before frank invasion occurs. In contrast, in situ BCC is not known, but minimally invasive "superficial" BCCs are common.