The predictive value of 2,-4, dinitrochlorobenzene skin testing in patients with bilharzial bladder cancer.

A group of 40 patients with bilharzial bladder cancer underwent quantitative skin testing with dinitrochlorobenzene and purified protein derivative of tuberculin before radical surgery. Correlations were made between various clinical parameters, patient outcome, skin test results and pathologic changes in the resected bladder and draining lymph nodes. Striking associations between dinitrochlorobenzene responses and tumor stage, tumor recurrence and several specific parameters of lymph node stimulation were found, while no correlations were made with the pathologic grade, size or type of tumor, degree of schistosomal infestation or tumor bed inflammation. Purified protein derivative responses showed no correlation with any parameter examined. Patient outcome also showed a good correlation with tumor stage and draining lymph node reaction. These findings indicate that dinitrochlorobenzene skin testing as a presumptive test of cell-mediated immunity may represent a good predictor of clinical outcome in patients with bilharzial bladder cancer, and correlates well with draining lymph node stimulation.