Abstract
BackgroundTo evaluate the efficacy of three additional cycles of chemotherapy in patients with the International Federation of Gynecology and Obstetrics Stage III or IV, who achieved a complete response after six cycles of intravenous adjuvant paclitaxel/carboplatin after surgery.MethodsThe clinical data of 94 patients with complete response after six cycles of adjuvant paclitaxel/carboplatin after surgery between January 1997 and March 2007 were reviewed retrospectively. Three additional cycles using the same chemotherapy were administered to 57 patients as consolidation chemotherapy (Group 1). Thirty-seven patients without the additional cycles served as controls (Group 2). Disease-free survival (DFS) and overall survival (OS) were evaluated using the Kaplan–Meier method with the log-rank test. The importance of consolidation chemotherapy as a prognostic factor affecting survival was examined using the Cox's proportional hazard analysis. The incidence of chemotherapy-induced hematological toxicities was compared between the two groups using chi-square test.ResultsMedian DFS and mean OS were not significantly different between the two groups (15 versus 22 months, P = 0.703; 69 versus 73 months, P = 0.891, respectively). Consolidation chemotherapy was not a prognostic factor of survival although optimal debulking surgery and lower value of serum CA-125 levels after six cycles of the chemotherapy were prognostic factors improving DFS (P < 0.01). Grade 3 or 4 leukopenia was more common in patients treated with consolidation chemotherapy than in those not treated (50.9 versus 21.6%, P = 0.004).ConclusionConsolidation chemotherapy using paclitaxel/carboplatin may be inefficient and relatively toxic to advanced-stage epithelial ovarian cancer patients with complete response to six cycles of the same chemotherapy after surgery.
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