TY - CHAP M1 - Book, Section TI - Cancer of the Skin A1 - Curti, Brendan D. A1 - Vetto, John T. A1 - Leachman, Sancy A. A2 - Loscalzo, Joseph A2 - Fauci, Anthony A2 - Kasper, Dennis A2 - Hauser, Stephen A2 - Longo, Dan A2 - Jameson, J. Larry Y1 - 2022 N1 - T2 - Harrison's Principles of Internal Medicine, 21e AB - Pigmented lesions are among the most common findings on skin examination. The challenge for the physician is to distinguish benign lesions from cutaneous melanomas and nonmelanoma skin cancers (NMSCs). Both melanoma and NMSC are increasing in frequency, and melanoma accounts for over half of the deaths resulting from skin cancer. Melanoma is an aggressive malignancy of melanocytes, pigment-producing cells that originate from the neural crest and migrate to the skin, meninges, mucous membranes, upper esophagus, and eyes. Melanocytes in each of these locations have the potential for malignant transformation, but the vast majority of melanomas arise in the skin, often permitting detection at a time when complete surgical excision leads to cure. Cutaneous melanoma can occur in people of all ages and all colors. Examples of malignant melanoma of the skin, mucosa, eye, and nail are shown in Fig. 76-1. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/25 UR - accessmedicine.mhmedical.com/content.aspx?aid=1196992686 ER -