categorical value specification pathologic primary tumor stage for colon and rectum according to AJCC 7th edition pT: Pathologic spread colorectal primary tumor (AJCC 7th Edition) pathologic primary tumor stage for colon and rectum according to AJCC 7th edition NCI BBRB, OBI A categorical value specification that is a pathologic finding about one or more characteristics of colorectal cancer following the rules of the TNM American Joint Committee on Cancer (AJCC) version 7 classification system as they pertain to staging of the primary tumor. TNM pathologic primary tumor findings are based on clinical findings supplemented by histopathologic examination of one or more tissue specimens acquired during surgery. Chris Stoeckert, Helena Ellis NCI BBRB metadata complete