Although tumors of the external genitaliaGenitalia are not as common as those occurring in sun-exposed skin, a wide variety of carcinomas and other tumors occur in the male and female external genitaliaGenitalia. The incidence of these tumors is both significant and rising, and due to their location and aggressiveness may carry significant functional, anatomic, and psychosexual morbidities as well as the risk of mortality secondary to tumor metastasis. Mohs micrographic surgeryMohs micrographic surgery is the treatmentTreatment of choice for most tumors in this anatomic region because of reduced recurrence ratesRecurrence rates, maximum sparing of histologically uninvolved tissue, and improved feasibility of anatomically and functionally sensitive reconstructionReconstruction.