Abstract
Expression of blood group A, B and H iso-antigens in oral mucosae was demonstrated by specific red cell adherence test in forty seven mucosal biopsies from oral cavity (14 normal, 10 leucoplakia and 23 squamous cell carcinomas). All normal mucosae gave a positive reaction whereas in malignancy only 6 cases of well differentiated squamous cell carcinomas were either weekly positive or showed a patchy reaction. Remaining cases were negative irrespective of their grading. In leucoplakia though the test was positive in all the cases, the intensity of adherence was less as compared to normal mucosa. The intensity of adherence was found to be directly related to the degree of cellular differentiation. Study of A, B and H isoantigens might help in deciding the prognosis in leukoplakia and/or early detection of malignancy.
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