percentage of study population developing colorectal tumors during a period of time percentage of study population developing malignant colorectal tumors during a period of time 2013-09-26T12:34:05Z CMO:0001802 JSmith MESH:D015179 RDO:9000031 The number of new cases of malignant 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. Malignant colorectal tumors are abnormal growths of tissue resulting from uncontrolled, progressive multiplication of cells and serving no physiological function, which display the properties of anaplasia, invasiveness and metastasis, and 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 adenocarcinoma incidence malignant colorectal cancer incidence malignant colorectal neoplasm incidence malignant colorectal tumor incidence