The authors report a case and aimed at discussing about Bowen's disease, an unusual pathology, especially in perianal area. It is an in situ carcinoma with invasive potential. Epidermal's histological abnormalities with basal membrane preservation is its main characteristic. This disease presents a slow progression, few or no specific symptoms and variable macroscopic aspect. These facts lead in several times to a late diagnosis. Biopsies and histopathological study confirm the diagnosis. The treatment of choice is wide surgical resection. Often it is necessary to utilize grafts or flaps to correct the cutaneous defects and allows a satisfactory cicatrization.
Perianal Bowen's disease; in situ epidermoid carcinoma; surgical treatment; "V-Y" flap
