Neoadjuvant chemotherapy in ovarian cancer

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Abstract
Primary radical tumor debulking followed by platinum/taxane-based chemotherapy is considered standard for advanced stage ovarian carcinomas. The extent of postoperative residual disease is the most important prognostic factor. However, complete tumor resection is achieved in only 40-50% of advanced ovarian cancers. For the remaining patients, who have an unfavorable prognosis, the concept of neoadjuvant or primary chemotherapy followed by interval laparotomy has emerged. Two different strategies are pursued. One is to administer several courses of neoadjuvant chemotherapy in order to downstage the tumor prior to primary debulking surgery. The other is to administer chemotherapy after suboptimal debulking surgery to optimize cytoreduction during interval laparotomy. Numerous retrospective studies demonstrated that neoadjuvant chemotherapy followed by primary debulking surgery is a feasible and safe approach. It is becoming increasingly evident that the selection of appropriate patients is crucial. Some studies demonstrated that the volume of ascites proved to be an easily measurable biomarker that allowed prediction of tumor resectability. However, further investigations are needed to better define patients who will benefit from neoadjuvant chemotherapy. Despite promising results, neoadjuvant chemotherapy must still be considered experimental. Therefore, the potential advantages of neoadjuvant chemotherapy need to be confirmed in prospective randomized studies.