Pioderma gangrenoso como síndrome paraneoplásico de un adenocarcinoma de recto

purpose: paraneoplastic syndromes are clinical syndromes caused by tumors occurring in places distant from the tumor itself. its incidence is underestimated. we present a case of paraneoplastic syndrome as an example, indicating the characteristics these syndromes must follow to be considered as such material and methods: a 72 year old woman with a skin disorder diagnosed as pyoderma gangraenosum before the diagnosis of a colo-rectal cancer were made. conclusion: colo-rectal tumors are the digestive neoplasms more frequently associated to pyoderma. the relation between pyoderma as a paraneoplastic syndrome of colo-rectal cancer is well established.