In this retrospective study, the modality and advantages of the multidisciplinary diagnostic work-up and therapy regarding colorectal neoplasm were analysed. Over the period 2004-2008, 63 patients underwent multidisciplinary treatment for colorectal cancer. All patients underwent surgery (laparoscopic/open). Exeresis was supplemented by adjuvant chemotherapy in those cases beyond IIA stage; all cases of extraperitoneal rectal and anal canal neoplasms plus one case of carcinoma of the transverse colon, initially inoperable, underwent neoadjuvant radiotherapy plus chemotherapy. The treatment was initiated approximately 3 weeks after the diagnosis. Fifty-four percent of patients with colonic and upper rectal neoplasms were given adjuvant chemotherapy, starting around 4 weeks after surgery. Exeresis was performed in those patients with extraperitoneal rectal and anal canal neoplasms (12.7%) about 6-8 weeks after they had completed neoadjuvant therapy. At the end of the treatment, 76% of the overall total numbers of patients were in good condition (follow-up 4-50 months). The remaining 24% suffered recurrences about 13 months after the treatment for colonic and upper rectal neoplasm, and 8 1/2 months after treatment for extraperitoneal rectal/anal canal neoplasms. Seventy-five percent of the recurring cases underwent treatment again, with 50% success; the others are still undergoing treatment. The best therapeutic results were obtained by programmed integration of the various diagnostic-therapeutic steps according to an algorithm which we elaborated to evaluate all types of neoplasm at any stage of illness.