Pigmented Bowen's disease and review of 420 Bowen's disease lesions.

Pigmented Bowen's disease is rare. We report an unusual case of pigmented Bowen's disease of the ring finger, which clinically presented as a superficial, spreading melanoma. Records of 420 lesions of Bowen's disease were reviewed; 7 lesions (1.67%) were pigmented and all occurred outside the anogenital area. We conclude that Bowen's disease should be considered in the differential diagnosis of pigmented lesions.