ABSTRACT
Bowen’s disease is a type of squamous cell carcinoma-in-situ marked by a soli tary, sharply demarcated, erythematous, scaly plaque of the skin or mucous mem branes. A second form of squamous cell carcinoma-in-situ is erythroplasia o f Queyrat, which appears as glistening red plaques on the uncircumcised penis. Both have the potential for progression to invasive carcinoma and should be resected completely with conservative surgery.
