percentage of study population developing malignant colorectal tumors during a period of time percentage of study population developing poorly differentiated malignant colorectal tumors during a period of time 2014-01-24T16:33:57Z CMO:0002071 JSmith MESH:D015179 RDO:9000031 The number of new cases of poorly differentiated 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. Poorly differentiated malignant colorectal tumors are abnormal growths of tissue in the large intestine resulting from uncontrolled, progressive multiplication of cells and serving no physiological function, which display the properties of anaplasia, invasiveness and metastasis, and do not display specific physical forms, physiologic functions, and chemical properties characteristic of the tissue. VT:0010554 clinical_measurement_ontology poorly differentiated colorectal adenocarcinoma incidence poorly differentiated malignant colorectal cancer incidence poorly differentiated malignant colorectal neoplasm incidence poorly differentiated malignant colorectal tumor incidence