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Twenty-four patients with invasive transitional cell carcinoma of the urinary bladder, recurrent after radiotherapy, were treated by intra-arterial infusion of tumor-immune pig lymph node cells. In 11 patients there was a remission of the disease process, and 3 patients remain alive and free of disease in excess of one year after treatment.

A total of 77 patients with invasive TCC of the urinary bladder each received a single arterial injection of tumor-immune pig lymph node cells (LNC), into the tumor blood supply. The patients were divided into 4 groups: (1) those receiving pig LNC as the only treatment (16 patients); (2) those who received pig LNC on relapse (judged by EUA cystoscopy and biopsy) following radical radiotherapy, 5,500 cGy (34 patients); (3) those who received pig LNC followed alter an interval of six weeks by radiotherapy, 4,000 cGy (10 patients); (4) as in Group 3 bus` with the dose of radiotherapy increased to 5,500 cGy (17 patients). Complete remission was characterized by complete disappearance of the tumor (for a varying time) following treatment. Partial remission was defined as: a reduction in the level of symptoms and a decrease in tumor size on F UA and/or cystoscopy. There were 1 complete and 3 partial remissions among the patients in Group 1, 5 complete and 7 partial in Group 2, 6 complete and 2 partial in Group 3, and 8 complete and 1 partial in Group 4. Of the 20 patients showing complete remission, 7 lived for more tha n five years after treatment.