Personalized Timing of Interval Debulking Surgery Based on KELIM After Neoadjuvant Chemotherapy in Advanced Ovarian Cancer - a Multicenter Randomized Phase II Non-inferiority Trial (PRESELECT-I Trial)
About 70% of epithelial ovarian cancer patients are diagnosed at advanced stage. When primary optimal surgery is not possible, neoadjuvant chemotherapy will followed by interval debulking surgery is one treatment option. However, there is no consensus on the optimal timing of the surgery. CA125 is a well-known tumor marker in ovarian cancer. Its kinetic change has been proven to correlate with the patients' response to chemotherapy and chance of optimal resection. This study aims to utilize the kinetic change of CA125 to customize the timing of surgery for individual patients and compare this with the standard clinical practice.
• Patients aged 18 years old or older
• Patients with Eastern Cooperative Oncology Group score 0-1 within 28 days prior to recruitment
• Patients who can sign the informed consent
• Patients with stage III-IV histologically or cytologically confirmed epithelial ovarian cancer (EOC), fallopian tube or primary peritoneal cancer not amenable for PDS
• Patients who have baseline computed tomography (CT) of thorax, abdomen and pelvis.
• Patients who are planned for neoadjuvant chemotherapy (NACT) using 3-weekly carboplatin and paclitaxel. Those who have received one cycle of NACT may be eligible if the CA125 schedule of the study group can be matched.
• Patients who have an evaluable CA125 level at baseline (i.e., baseline level is at least 2x upper limit of normal)
• Patients who agree for chemotherapy and interval debulking surgery (IDS) if the disease becomes operable after NACT
• Patients with adequate hematologic, liver and renal functions for chemotherapy
⁃ Patients who agree to receive adjuvant chemotherapy after IDS. The total number of NACT and adjuvant chemotherapy should be four or above, up to maximum of 9 cycles.
⁃ Patients who have childbearing potential should practice highly effective contraception throughout the study until at least 30 days after completion of the treatment.
⁃ Patients must have either germline and / or somatic BRCA test, or homologous recombination deficiency (HRD) test.