Invasive squamous cell carcinoma of the carpus: malignant transformation of epidermis dysplasia verruciformis.
Epidermodysplasia verruciformis is a rare disease that is characterized by the eruption of wartlike skin lesions. There is a high incidence of malignant transformation of these lesions, especially in areas exposed to the sun, such as the face or the dorsum of the hands. We present a case that demonstrates many aspects of this disease entity, which ultimately required amputation of the hand because of invasive squamous cell carcinoma of the carpal bones.