Radiation therapy with or without weekly cisplatin for bulky stage 1B cervical carcinoma: follow-up of a Gynecologic Oncology Group trial.

OBJECTIVE: The objective of the study was to confirm that concurrent cisplatin (CT) with radiation therapy (RT) is associated with improved long-term progression-free survival (PFS) and overall survival (OS), compared with RT alone in stage IB bulky carcinoma of the cervix, when both groups' therapy is followed by hysterectomy. STUDY DESIGN: Three hundred seventy-four patients entered this trial. There were 369 evaluable patients; 186 were randomly allocated to receive RT alone and 183 to receive CT plus RT. Radiation dosage was 45 Gray (Gy) in 20 fractions followed by low dose-rate intracavitary application(s) of 30 Gy to point A. Chemotherapy consisted of intravenous cisplatin 40 mg/m2 every week for up to 6 weekly cycles. Total extrafascial hysterectomy followed the completion of RT by 6-8 weeks. RESULTS: Preliminary results have been published, at which time there were 292 censored observations, and median duration of follow-up was only 36 months. Patient and tumor characteristics were well balanced between the regimens. The median patient age was 41.5 years; 81% had squamous tumors; 59% were white. Median follow-up is now 101 months. The relative risk for progression was 0.61 favoring CT plus RT (95% confidence interval [CI] 0.43 to 0.85, P < .004). At 72 months, 71% of patients receiving CT plus RT were predicted to be alive and disease free when adjusting for age and tumor size, compared with 60% of those receiving RT alone. The adjusted death hazard ratio was 0.63 (95% CI 0.43 to 0.91, P < .015) favoring CT plus RT. At 72 months, 78% of CT plus RT patients were predicted to be alive, compared with 64% of RT patients. An increased rate of early hematologic and gastrointestinal toxicity was seen with CT plus RT. There was no detectable difference in the frequency of late adverse events. CONCLUSION: Concurrent weekly cisplatin with RT significantly improves long-term PFS and OS when compared with RT alone. Serious late effects were not increased. The inclusion of hysterectomy has been discontinued on the basis of another trial. Pending further trials, weekly cisplatin with radiation is the standard against which other regimens should be compared.

A phase III trial of surgery with or without adjunctive external pelvic radiation therapy in intermediate risk endometrial adenocarcinoma: a Gynecologic Oncology Group study.

BACKGROUND: Despite their low risk for recurrence, many women with endometrial adenocarcinoma receive postoperative radiation therapy (RT). This study was developed to determine if adjunctive external beam irradiation lowers the risk of recurrence and death in women with endometrial cancer International Federation of Gynaecology and Obstetrics (FIGO) stages IB, IC, and II (occult disease). METHODS: Four hundred forty-eight consenting patients with "intermediate risk" endometrial adenocarcinoma were randomized after surgery to either no additional therapy (NAT) or whole pelvic radiation therapy (RT). They were followed to determine toxicity, date and location of recurrence, and overall survival. A high intermediate risk (HIR) subgroup of patients was defined as those with (1) moderate to poorly differentiated tumor, presence of lymphovascular invasion, and outer third myometrial invasion; (2) age 50 or greater with any two risk factors listed above; or (3) age of at least 70 with any risk factor listed above. All other eligible participants were considered to be in a low intermediate risk (LIR) subgroup. RESULTS: Three hundred ninety-two women met all eligibility requirements (202 NAT, 190 RT). Median follow-up was 69 months. In the entire study population, there were 44 recurrences and 66 deaths (32 disease or treatment-related deaths), and the estimated 2-year cumulative incidence of recurrence (CIR) was 12% in the NAT arm and 3% in the RT arm (relative hazard (RH): 0.42; P=0.007). The treatment difference was particularly evident among the HIR subgroup (2-year CIR in NAT versus RT: 26% versus 6%; RH=0.42). Overall, radiation had a substantial impact on pelvic and vaginal recurrences (18 in NAT and 3 in RT). The estimated 4-year survival was 86% in the NAT arm and 92% for the RT arm, not significantly different (RH: 0.86; P=0.557). CONCLUSIONS: Adjunctive RT in early stage intermediate risk endometrial carcinoma decreases the risk of recurrence, but should be limited to patients whose risk factors fit a high intermediate risk definition.

Radiation therapy with and without extrafascial hysterectomy for bulky stage IB cervical carcinoma: a randomized trial of the Gynecologic Oncology Group.

OBJECTIVE: To evaluate, in a randomized clinical trial, the role of adjuvant hysterectomy after standardized radiation in improving progression-free survival and survival for patients with "bulky" stage IB cervical cancer. METHODS: A total of 256 eligible patients with exophytic or "barrel" shaped tumors measuring > or = 4 cm were randomized to either external and intracavitary irradiation (RT, N = 124) or attenuated irradiation followed by extrafascial hysterectomy (RT + HYST, N = 132). Twenty-five percent of patients had tumors with a maximum diameter of > or =7 cm. RESULT: Tumor size was the most pronounced prognostic factor followed by performance status 2 and age at diagnosis. Hysterectomy did not increase the frequency of reported grade 3 and 4 adverse effects (both groups, 10%). The majority of these adverse effects were from the gastrointestinal or genitourinary tracts exclusively. There was a lower cumulative incidence of local relapse in the RT + HYST group (at 5 years, 27% vs. 14%). There were no statistical differences in outcomes between regimens except for the adjusted comparison of progression-free survival, although all indicated a lower risk in the adjuvant hysterectomy regimen (unadjusted relative risk [URR] of progression, 0.77, P = 0.07; URR of death, P = 0.26, both one tail). CONCLUSION: Overall, there was no clinically important benefit with the use of extrafascial hysterectomy. However, there is good evidence to suggest that patients with 4-, 5-, and 6-cm tumors may have benefitted from extrafascial hysterectomy (URR of progression; 0.58; URR of death, 0.60).