colorectal tumor incidence/prevalence measurement percentage of study population developing colorectal tumors during a period of time 2013-09-26T12:32:32Z CMO:0001801 JSmith MESH:D015179 The number of new cases of colorectal tumors appearing in a study population during a certain period compared to the total number of individuals in the study population, expressed as a percentage. Colorectal tumors are abnormal growths of tissue resulting from uncontrolled, progressive multiplication of cells and serving no physiological function, which occur in the large intestine, the distal portion of the alimentary canal, especially in the colon and/or rectum, the segment of the large intestine between the cecum and the anal canal. clinical_measurement_ontology colorectal cancer incidence colorectal neoplasm incidence colorectal tumor incidence