Objective: To determine if three courses consisting of 50 mg/m2 cis-platinum, 1 mg/m2 vincristine, and 25 mg/m2 bleomycin (day 1-3) at 10-day intervals can improve survival before Wertheim-Meigs + radiotherapy.
Material: Two hundred five unselected stage Ib patients (having tumors > 2 cm in diameter) were divided into two groups at random: (1) The group control consisted of 103 patients (56 bulky, > 4 cm diameter) treated with Wertheim-Meigs (if the tumor was resectable with free surgical margins) + adjuvant radiotherapy to whole pelvis (extended field radiation was used only in patients with paraaortic lymph node metastases). When the tumor was unresectable, a surgical staging was performed and radiotherapy was the chosen treatment. (2) Neoadjuvant (102 patients, 61 bulky) had neoadjuvant chemotherapy and then the same treatment as the control patients.
Results: After 67 (31-102) months of follow-up, no difference was seen in tumors > 2 and < 4 cm in both groups (C = 77% vs N = 82%), but statistically significant differences were seen in survival and disease-free survival, in bulky tumors, and between patients with neoadjuvant chemotherapy + Wertheim-Meigs + radiotherapy (80%) and the control (61%). This was due to an increased operability that was substantially improved in bulky tumors in the neoadjuvant chemotherapy group (61/61, 100%) vs control (48/56, 85%; P < 0.01). After 7 years of follow-up, the outcome of the unresectable bulky control group of patients is significantly worse (14%) than that of the resectable group (69%; P < 0.001). With regard to recurrences, a significant decrease in pelvic failures in the neoadjuvant chemotherapy group was observed (P < 0.001). Survival was improved in bulky resectable cases (N = 81% vs C = 69%, P < 0.05). Pathological findings for the surgical specimens revealed differences between both groups because all the risk factors such as parametrial and lymph node metastases, tumor bulk, and vascular embolism had been decreased (P < 0.001).
Conclusion: Neoadjuvant chemotherapy can improve survival because of increased operability with free survival margins and a decrease in pathologic risk factors in unselected, bulky (> 4 cm diameter) stage Ib patients.