Comparison of survival between upfront primary debulking surgery versus neoadjuvant chemotherapy for stage III/IV ovarian, tubal and peritoneal cancers in phase III randomized trial: JCOG0602.

2018 ◽  
Vol 36 (15_suppl) ◽  
pp. 5500-5500 ◽  
Author(s):  
Takashi ONDA ◽  
Toyomi Satoh ◽  
Toshiaki Saito ◽  
Takahiro Kasamatsu ◽  
Toru Nakanishi ◽  
...  
Author(s):  
Takashi Onda ◽  
Yumiko Oishi Tanaka ◽  
Satomi Kitai ◽  
Tomoko Manabe ◽  
Mitsuya Ishikawa ◽  
...  

Abstract Purpose Computed tomography of the abdomen and pelvis is a useful imaging modality for identifying origin and extent of ovarian cancer before primary debulking surgery. However, the International Federation of Gynecology and Obstetrics staging for ovarian cancer is determined based on surgico-pathological findings. The purpose of this study is to determine whether computed tomography staging can be the surrogate for surgico-pathological International Federation of Gynecology and Obstetrics staging in advanced ovarian cancer undergoing neoadjuvant chemotherapy. Methods Computed tomography staging was compared with surgico-pathological International Federation of Gynecology and Obstetrics staging in primary debulking surgery arm patients in a randomized controlled trial comparing primary debulking surgery and neoadjuvant chemotherapy (JCOG0602). The cancer of primary debulking surgery arm was identically diagnosed regarding the origin and extent with the cancer of neoadjuvant chemotherapy arm before accrual, using imaging studies (computed tomography and/or magnetic resonance imaging), cytological examination (ascites, pleural effusion or tumor contents fluid) and tumor marker (CA125 > 200 U/mL and CEA < 20 ng/mL). Institutional computed tomography staging was also compared with computed tomography staging by central review. Results Among 149 primary debulking surgery arm patients, 147 patients who underwent primary debulking surgery immediately were analyzed. Positive predictive values and sensitivity of computed tomography staging for surgical stage III disease (extra-pelvic peritoneal disease and/or retroperitoneal lymph node metastasis) were 99%. Meanwhile, positive predictive values for the presence of small (≤2 cm) extra-pelvic peritoneal disease were low; <20% in omentum. Accuracy of institutional computed tomography staging was comparable with computed tomography staging by central review. Conclusions Preoperative computed tomography staging in each institution can be the surrogate for surgico-pathological diagnosis in stage III disease of ovarian cancer patients undergoing neoadjuvant chemotherapy without diagnostic surgery, but reliability of diagnosis of stage IIIB disease is inadequate. Clinical trial registration: UMIN000000523(UMIN-CTR).


2020 ◽  
Vol 50 (4) ◽  
pp. 379-386
Author(s):  
Shin Nishio ◽  
Kimio Ushijima

Abstract Primary debulking surgery followed by platinum-based chemotherapy remains the standard treatment of patients with stage III–IV epithelial ovarian cancer. Neoadjuvant chemotherapy is an alternative treatment regimen that can be considered in selected patients. Complete cytoreduction, both through primary debulking surgery and interval debulking surgery, has a major positive effect on survival and should be the goal, even if this requires extensive surgery. When thorough assessment of tumor spread and performance status of the patient indicates that complete primary cytoreduction is not feasible without unacceptable morbidity, then alternative therapeutic strategies, such as neoadjuvant chemotherapy, must be considered. Such patients can be offered the option of interval debulking surgery after checking their response to neoadjuvant chemotherapy and resolution of the initial obstacles for primary debulking surgery (i.e. complete response of irresectable disease and improvement of the performance status). Current evidence suggests that a selected group of patients with International Federation of Gynecology and Obstetrics stage III–IV ovarian cancer will benefit from NAC-IDS. Research is ongoing to identify patients who might derive the greatest benefit from neoadjuvant chemotherapy followed by interval debulking surgery, instead of primary debulking surgery, on the basis of radiological, genetic, pathological, and immunological variables. In this review, we discuss current knowledge about the clinical significance of primary debulking surgery and neoadjuvant chemotherapy in advanced ovarian cancer and discuss unanswered questions in the field.


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