The Italian society of colo-rectal surgery (SICCR) is dedicated to improving the study, prevention and management of the diseases of the colon, rectum and anus. One of the aims of the society is to establish guidelines to the treatment of these diseases. These guidelines are based on the international literature and on the best available evidence. Clinical practice guidelines are one of the most important instruments to provide therapeutic decision-making support, based on the best scientific evidence available at the time. Guidelines are advisory and not prescriptive, susceptible to continual variations secondary to innovations and new scientific evidence. These guidelines are a guide for all colo-rectal surgeons and physicians who approach anal cancer.