[Extramammary Paget's disease. A case report].

The case of a feminine patient of 88 years-old with a dermatosis located in vulva is reported, the dermtosis was characterized by an unique erythematous lession of 8 cm of diameter of more than 4 years of evolution. The patient received many treatments without improvement. A cutaneous biopsy was made, finding epidermis infiltrated by cells characteristic of extramammary Paget's disease. This case is reported because of the lack of information on this topic which affects the prognosis.