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  • Title: Outcomes of Cytoreductive Surgery and Hyperthermic Intraperitoneal Chemoperfusion in Patients with High-Grade, High-Volume Disseminated Mucinous Appendiceal Neoplasms.
    Author: Polanco PM, Ding Y, Knox JM, Ramalingam L, Jones H, Hogg ME, Zureikat AH, Holtzman MP, Pingpank J, Ahrendt S, Zeh HJ, Bartlett DL, Choudry HA.
    Journal: Ann Surg Oncol; 2016 Feb; 23(2):382-90. PubMed ID: 26429720.
    Abstract:
    BACKGROUND: High-grade (HG) mucinous appendiceal neoplasms (MAN) have a worse prognosis than low-grade histology. Our objective was to assess the safety and efficacy of cytoreductive surgery with hyperthermic intraperitoneal chemoperfusion (CRS/HIPEC) in patients with high-grade, high-volume (HG-HV) peritoneal metastases in whom the utility of this aggressive approach is controversial. METHODS: Prospectively collected perioperative data were compared between patients with peritoneal metastases from HG-HV MAN, defined as simplified peritoneal cancer index (SPCI) ≥12, and those with high-grade, low-volume (HG-LV; SPCI <12) disease. Kaplan-Meier curves and multivariate Cox regression models identified prognostic factors affecting oncologic outcomes. RESULTS: Overall, 54 patients with HG-HV and 43 with HG-LV peritoneal metastases underwent CRS/HIPEC. The HG-HV group had longer operative time, increased blood loss/transfusion, and increased intensive care unit length of stay (p < 0.05). Incomplete macroscopic cytoreduction (CC-1/2/3) was higher in the HG-HV group compared with the HG-LV group (68.5 vs. 32.6 %; p = 0.005). Patients with HG-HV disease demonstrated worse survival than those with HG-LV disease (overall survival [OS] 17 vs. 42 m, p = 0.009; time to progression (TTP) 10 vs. 14 m, p = 0.024). However, when complete macroscopic resection (CC-0) was achieved, the OS and progression-free survival of patients with HG-HV disease were comparable with HG-LV disease (OS 56 vs. 52 m, p = 0.728; TTP 20 vs. 19 m, p = 0.393). In a multivariate Cox proportional hazard regression model, CC-0 resection was the only significant predictor of improved survival for patients with HG-HV disease. CONCLUSIONS: Although patients with HG-HV peritoneal metastases from MAN have worse prognosis compared with patients with HG-LV disease, their survival is comparable when complete macroscopic cytoreduction is achieved.
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