Pseudomyxoma Peritonei: Effect of Chronic Continuous Immunotherapy with a Streptococcal Preparation, OK-432 after Surgery

Abstract
Three cases of pseudomyxoma peritonei with ovarian neoplasma were treated by adjunctive immunotherapy with OK-432 after surgery. In 2 of the 3 cases, the periods of intramuscular injection of OK-432 were 11 and 16 months, respectively, and the 2 patients remain clinically free from evidence of disease, 7 and 6 years after surgery. The third patient is still undergoing treatment, with no evidence of recurrence at 4 months after surgery. These results, although for a small number of patients, clearly suggest that adjunctive immunotherapy with OK-432 may be suitable for treating pseudomyxoma peritonei of ovarian tumor origin.

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