Retrospective study of characteristics and hyperthermia intraperitoneal perfusion in mucinous borderline ovarian tumor and mucinous ovarian carcinoma

Background: Previous clinical trials regarding the therapy in epithelial ovarian tumors have involved patients with all types of ovarian tumors. Mucinous borderline tumors may progress to invasive carcinoma even after therapy and Patients with mucinous ovarian cancer (MOC) often have a worse prognosis. Our objectives were to investigate the use of hyperthermic intraperitoneal perfusion therapy (HIPE) and the clinicopathological features of mucinous borderline ovarian tumor (MBOT) and MOC. Methods: A retrospective study was conducted on 240 patients with MBOT or MOC. The clinicopathologic feature included age, preoperative serum tumor markers, surgical procedures, surgical and pathological staging, frozen pathology, treatment, and recurrence. The effect of HIPE in MBOT and MOC were examined and the occurrence of adverse events was analyzed. Results: The median age was 34 years in 176 MBOT patients. Some 40.1% of patients had elevated CA125, 40.2% had elevated CA199, and 5.5% had elevated HE4. The accuracy rate for frozen pathology of resected specimen was 43.8%. The was no statistical difference in the recurrence rate between fertility sparing and non-fertility-sparing surgery. Due to a short follow-up time in the RIPE group, no significant recurrence rate was found. The median age was 59 years in 64 MOC patients. Some 90.5% patients had elevated CA125, 95.3% had elevated CA199, and 75% had elevated HE4. There were 28 patients diagnosed with Federation International of Gynecology and Obstetrics (FIGO) stage I or II. For FIGO stage III and IV patients, the median progression-free survival (PFS) was 27 months in the HIPE group and the median overall survival (OS) in patients treated with RIPE was 53 months, which was significantly longer than that the other group (19 months and 42 months). There was no severe fatal complication in all HIPE group. Conclusions: MBOT was usually diagnosed at an early stage and has a good prognosis. Hyperthermic intraperitoneal perfusion chemotherapy (HIPEC) can improve the survival of patients with advanced MOC and is safety. Combined use of CA125, CA199, HE4 can assist in the differential diagnosis of mucinous borderline neoplasms and mucinous carcinoma. Randomized studies evaluating dense HIPEC in the management of advanced ovarian cancer should be warranted.