from tumors obtained from 87 patients with colorectal cancer during operation , portal blood levels of carcinoembryonic antigen ( cea ) in drainage vein were measured and evaluated , according to the disease stage and histology , in comparison with cancerous tissue cea in the extracts of surgical specimens and immunohistochemical analyses graded according to localization patterns and immunoreactivity ;
C0027651
tumors
C0006826
cancerous