Colorectal cancer is the most common tumor of the digestive tract in the developed world, the rectum being the most affected site. It is the third cancer that is diagnosed most frequently in the United States, Europe and Cuba [1]. In Cuba this pathology is among the first five causes of morbidity and mortality due to digestive cancer, occupying the fourteenth place as the cause of death [2]. In addition to being a subject little explored so far its incidence is increasing more and more. This cancer variety has a high rate of local recurrence after surgery, which varies between 30% and 65% in different studies. It has been shown that those patients with locally advanced rectal cancer Objective: To analyze the usefulness of endoscopic ultrasonography in the staging of patients with malignant rectal tumors. Development: Staging by endoscopic ultrasonography of malignant tumors of the rectum allows to assume appropriate therapeutic behaviors (radiochemotherapy or surgery). Conclusions: In this study it is expected to find that the staging by endoscopic ultrasonography of rectal tumors, helps in the decision of the use of adequate therapy.
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