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Combined Immunotherapy (OK-432, IL-2) With Chemotherapy Decrease the Recurrence Rate in Advanced Ovarian Cancer

Objective: In advanced ovarian cancer, traditional therapy included debulking surgery and postoperative chemotherapy. We proposed immunochemotherapy (IMCT) combined with picibanil (OK-432), interleukin-2 (IL-2), and traditional platinum- and taxol-based chemotherapy as a better treatment option for advanced ovarian cancer. Methods: We retrospectively reviewed the medical records of 51 patients with advanced ovarian cancer between 2007 and 2015 at Chang Gung Memorial Hospital Linkou Medical Center, including 26 patients who were treated with OK-432, IL-2, and platinum- and taxol-based chemotherapy (IMCT group) after debulking surgery; another 25 were treated with traditional platinum- and taxol-based chemotherapy (traditional chemotherapy group) after debulking surgery. We analyzed the difference in age, follow-up period, recurrence rate, and diagnosis-to-recurrence period between the 2 groups. We also analyzed the difference in complete blood cell counts, differentiating counts, and cancer antigen 125 (CA-125) at 1 month after treatment. Results: The recurrence rate between the IMCT and traditional chemotherapy groups showed a significant difference (53.8% vs 88%; P = .0128). The diagnosis-to-recurrence duration was longer in the IMCT than in the traditional chemotherapy groups (33.21 vs 25.63 months), although no statistical significance was found (P = .4668). In laboratory analysis at 1 month after treatment, the white blood cell, absolute neutrophil, and absolute lymphocyte counts (ALCs) were significantly higher in the IMCT group. On the other hand, CA-125 was significantly lower, and ALC was significantly higher in the nonrecurrence group. Conclusions: Combined IMCT and chemotherapy have lower recurrence rate compared to traditional chemotherapy after debulking surgery for the treatment of advanced ovarian cancer.