| Summary: | Shuang Ye,1,2,* Shuling Zhou,2,3,* Wei Chen,1,2,4,* Libing Xiang,1,2 Xiaohua Wu,1,2 Huijuan Yang1,2 1Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, People’s Republic of China; 2Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People’s Republic of China; 3Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, People’s Republic of China; 4Department of Obstetrics and Gynecology, Minhang Hospital, Fudan University, The Central Hospital of Minhang District, Shanghai, People’s Republic of China*These authors contributed equally to this workCorrespondence: Huijuan YangDepartment of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, People’s Republic of ChinaTel +86-21-65260535Fax +86-21-64174774Email huijuanyang@hotmail.comBackground: To evaluate the recurrence patterns and survival outcomes of surgically treated relapsed ovarian clear cell carcinoma (OCCC) patients.Methods: We performed a comprehensive retrospective analysis of all the patients who underwent secondary debulking from 2004/10 to 2019/04.Results: In total, 45 eligible patients were included. 75.6% of the patients had early-stage disease and platinum-sensitive recurrence accounted for 70.5%. The median progression-free survival after primary surgery (PFS 1) was 20 months (range, 2– 137). Of all, 64.4% patients had solitary recurrence and 86.7% patients had no residual disease after secondary surgery. Regarding tumor distribution, the most common site was pelvis (47.5%), followed by lymph node metastases (18.0%) and abdominal wall lesions (8.2%). For the entire population, the median disease-free survival after recurrence (PFS 2) and post-relapse survival (PRS) was 15 months (range, 0– 96), and 24 months (range, 3– 159), respectively. Eight patients (17.8%) had a prolonged PFS2 more than 30 months. Patients with localized relapse had better survival including PFS 2 (P=0.023), PRS (P=0.004), and overall survival (OS) (P=0.029). Patients who achieved complete resection tended to have longer PFS 2 (P=0.017). After multivariate analysis, complete resection at recurrence remained as an independent positive predictor for PFS 2 (P=0.022). The median OS was 50 months and was significantly associated with platinum response (P=0.003) and number of relapsed lesions (P=0.002).Conclusion: A high rate of pelvic recurrence was noted in this population. Patients with focal recurrence had a favorable prognosis. Complete resection at secondary debulking proved to be an independent predictor for disease-free survival.Keywords: ovarian neoplasms, clear cell carcinoma, recurrence, survival
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