Pilot study of concurrent cisplatin, 5-fluorouracil, and external beam radiotherapy prior to radical surgery +/- intraoperative electron beam radiotherapy in locally advanced cervical cancer.

PURPOSE: The purpose of this study was to describe the feasibility of a combined preoperative chemoradiation program followed by radical surgery in advanced cervical cancer.
MATERIALS AND METHODS: From February 1988 to April 1997, 40 patients with carcinoma of the cervix were treated with preoperative external beam radiotherapy to 45 Gy in 5 weeks. Patients received concurrent continuous infusion cisplatin (20 mg/m2) and 5-fluorouracil (1500 mg) chemotherapy during the first (days 1-4) and fifth (days 22-25) weeks of the radiation course. Radical surgery was performed 4-6 weeks after the completion of the preoperative treatment. Intraoperative radiotherapy was given to 20 patients, based on intraoperative assessment.
RESULTS: Toxicity associated with chemoradiation was usually mild except in two patients who presented WHO grade 4 bone marrow aplasia. Three patients developed postoperative ureterovaginal fistula, and five patients developed long-term hydronephrosis that needed ureteral stenting. Clinical response was observed in 95% of the patients (55% complete response). The analysis of the surgical specimens revealed complete pathological response in 67.5% of the cases and partial pathological response in 32.5%. As expected, the degree of pathological response was predicted by the degree of clinical response (P = 0.001). Nine-year local control, distant metastases-free survival, disease-free survival, and overall survival were 86, 84, 81, and 85%, respectively. Patients displaying a complete pathological response had statistically significant improved local control (P = 0.004), distant metastases-free survival (P = 0.009), disease-free survival (P = 0.002), and overall survival (P = 0.038).
CONCLUSIONS: Cisplatin plus 5-fluorouracil preoperative chemoradiation is active and usually well tolerated in locally advanced carcinoma of cervix, inducing a high rate of clinical and pathological complete responses. When this therapy is followed by radical surgery, the local control rates are excellent, even in patients with advanced stages or poor response. These improved local control rates may be achievable only through extensive surgical resection, with a parallel increase in the complication rates. Copyright 1999 Academic Press.