[Immunohistochemical demonstration of carcinoembryonic antigen (CEA) and ABO (H) blood group antigens on tissue sections of urinary bladder tumors].

The carcinoembryonic antigen (CEA) and ABO (H) blood group antigens of 47 bladder tumors were investigated by immunohistochemistry (CEA by peroxidase-antiperoxidase method and blood group antigens by Avidin-biotin-peroxidase complex method) and the results were compared with the histopathological diagnosis. Twenty five percent of the bladder tumors had CEA-positive tumor cells. They were found in 11.1% of pT1 cases, in 12.5% of pT2 cases, 70.0% of pT3 cases and 50.0% of pT4 cases and were also found in 13.3% of grade I cases, in 50.0% of grade II cases and in 40.0% of grade III cases. On the other hand, positive blood group antigen cells were found in 85.2% of pT1 cases, 50.0% of pT2 cases, 20.0% of pT3 cases and 50.0% of the pT4 cases and also in 80.0% of the grade I cases, 41.1% of the grade II cases, and 20.0% of the grade III cases. A statistical difference was seen between the low stage (pT1) and high stage cases (pT2-pT4) and between the low grade (G-I) and high grade cases (G-II, III) (P less than 0.01) for both CEA and the blood group antigens which were statistically related (P less than 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)