Stage III and Stage IV Ovarian Epithelial Cancer Treatment
Median OS for the primary debulking surgery was 29 months, compared with 30 months for patients assigned to neoadjuvant chemotherapy. The hazard ratio (HR) for death in the group assigned to neoadjuvant chemotherapy followed by interval debulking, as compared with the group assigned to primary debulking surgery followed by chemotherapy, was 0.98 (90% confidence interval [CI], 0.84–1.13; P = .01 for noninferiority).[Level of evidence: 1iiA] Perioperative and postoperative morbidity and mortality were higher in the primary-surgery group (7.4% severe hemorrhage and 2.5% deaths, contrasting with 4.1% severe hemorrhage and 0.7% deaths in the neoadjuvant group). The strongest independent predictor of prolonged survival was the absence of residual tumor after surgery. The subset of patients achieving optimal cytoreduction (≤1 cm residuum) whether after primary debulking surgery or after neoadjuvant chemotherapy followed by interval debulking surgery had the best median OS.
For the past 3 decades, the Gynecologic Oncology Group (GOG) has conducted separate trials for women whose disease has been optimally cytoreduced (most recently defined as ≤1 cm residuum) and for those who had suboptimal cytoreductions (>1 cm residuum). The extent of residual disease following the initial surgery is a determinant of outcome in most series [1,2,3,4] and has been used in the design of clinical trials, particularly by the GOG.
On the basis of these findings, the standard treatment approaches are subdivided into the following:
- Treatment options for patients with optimally cytoreduced stage III disease.
- Treatment options for patients with suboptimally cytoreduced stage III and stage IV disease.
Treatment Options for Patients With Optimally Cytoreduced Stage III Disease
The pharmacologic basis for the delivery of anticancer drugs by the IP route was established in the late 1970s and early 1980s. When several drugs were studied, mostly in the setting of minimal residual disease at reassessment after patients had received their initial chemotherapy, cisplatin alone and in combination received the most attention. Favorable outcomes from IP cisplatin were most often seen when tumors had shown responsiveness to platinums and with small-volume tumors (usually defined as tumors <1 cm). In the 1990s, randomized trials were conducted to evaluate whether the IP route would prove superior to the intravenous route. IP cisplatin was the common denominator of these randomized trials.