Further studies on specificity of red cell adherence test: nonmalignant bladder lesions

Specific red cell adherence test for blood group antigens was utilized in 32 nonmalignant bladder lesions, none of which was associated with bladder cancer, to determine the specificity of this test. All of the 14 lesions of cystitis cystica, cystitis glandularis, and chronic cystitis retained their antigens. Of the 18 lesions of squamous metaplasia, 13 (72%) were antigen positive. Testing for blood group antigens showed an overall 84 per cent specific rate in 27 of the 32 nonmalignant bladder lesions.