[Hereditary gastrointestinal cancer syndromes: the role of genetic counseling].

Mr. Editor, The National Comprehensive Cancer Network (NCCN) has determined that when a syndrome of predisposition to cancer is suspected, it is necessary to refer the patient for genetic evaluation because of the implications for diagnosis and management, as well as follow-up in the family (1). The genetic evaluation includes the description of the personal/family history and the request for the corresponding genetic study.