Carcinoma verrugoso

a 76 year old farmer from turrialba (cartago), presented with a 3 year old lesion of his right pal and proximal fingers. it was exophitic, wart like, and it measured 5x11 cm, draining caseous material from its crests. the lesion had grows quickly for the last 3 months and it became tender to the point of making impossible for him to work. a series of tests were done to rule out other possible infections causes, after several biopsies the diagnosis of verrocous carcinoma was made. the patient underwent a partial amputation of his hand. this tumor is considered a from of squamous cell carcinoma, we present here its classification, pathogenesis, histopathology, clinical manifestations and diferential diagnosis.