Skin cancer is the most common form of cancer in the United States, with the incidence increasing considerably. At current rates in the United States, a skin cancer will develop in 1 in 6 people during their lifetime.1 The most common of skin cancers may be categorized into 2 major groups: melanoma and nonmelanoma skin cancers. The latter group consists primarily of basal cell carcinomas and squamous cell carcinomas. Roughly 1,200,000 nonmelanoma skin cancers develop annually in the United States. These tumors are rarely fatal, but are considered to be fast growing tumors that if neglected may be locally and functionally destructive.In contrast, melanoma represents 5% of all diagnosed cancers in the United States, 15% of which prove to be fatal.3 Although melanoma is seen more with increasing age, it is the most frequent cancer plaguing women aged 25 to 29 years, and the second most frequent cancer afflicting women aged 30 to 34.2 Tumor depth is the most important prognostic indicator for melanoma, thus early recognition and management are imperative for improved therapeutic outcome.Although the nonmelanoma and melanoma skin cancers encompass the vast majority of skin cancers, there is a large number of other malignancies of the skin that are less commonly confronted by the clinician. Neoplasms of the skin classically have been divided into those that differentiate from the epidermis, dermis, adnexal structures of the skin, and those derived systemically. This review focuses on the most frequent malignant neoplasms, and divides them into those that are classically designated nonmelanoma skin cancers (also known as keratinocytic tumors), melanoma, and other less common skin cancers of the skin. An extensive list of skin malignancies is provided in Box 1.