Treatment of Bowen's disease and erythroplasia of Queyrat.

Bowen's disease of the skin may have differing clinical presentations depending on the skin surface on which it presents, but has the same histologic features of squamous cell carcinoma in situ wherever it occurs. The etiologic factors include ultraviolet light and human papillomavirus infection. The choice of therapy requires a consideration for retention of form, function and cosmosis while offering a high cure rate. The immunodualtory agent imiquimod has been shown to be an effective treatment on a variety of skin surfaces.