the expression of mhc class ii antigens ( hla-dr , hla-dp and hla-dq ) and the associated invariant chain ( ii ) was studied in epithelial cells of normal colorectal mucosae , colorectal adenomas and carcinomas , using a sensitive immunoperoxidase technique with monoclonal antibodies on frozen sections .
C0014597
epithelial cells
C1302401
colorectal adenomas