Lactate dehydrogenase isoenzyme pattern in uninvolved mucosa of patients with colorectal carcinoma.

Colorectal mucosa from patients with colorectal carcinoma was compared with rectal mucosa from a control group. It was found that the LDH isoenzyme pattern of uninvolved mucosa proximal and distal to the carcinoma differed from that of normal tissue and resembled that of carcinoma tissue except in the case of the uninvolved mucosa proximal to the carcinoma of the sigmoid colon, which did not differ from normal mucosa.