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12.08.2016 | Gastrointestinal Oncology | Ausgabe 1/2017

Annals of Surgical Oncology 1/2017

Hyperthermic Intraperitoneal Chemotherapy (HIPEC) at the Time of Primary Curative Surgery in Patients with Colorectal Cancer at High Risk for Metachronous Peritoneal Metastases

Zeitschrift:
Annals of Surgical Oncology > Ausgabe 1/2017
Autoren:
MD Dario Baratti, PhD Shigeki Kusamura, PhD Domenico Iusco, PhD Silvia Gimondi, MD Filippo Pietrantonio, MD Massimo Milione, MD Marcello Guaglio, MD Serena Bonomi, MD Antonio Grassi, MD Salvatore Virzì, MD Ermanno Leo, MD Marcello Deraco
Wichtige Hinweise
Marcello Deraco, Ermanno Leo, and Salvatore Virzì contributed equally to this paper.

Abstract

Background

Cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (HIPEC) are maximally effective in early-stage colorectal cancer peritoneal metastases (CRC-PM); however, the use of HIPEC to treat subclinical-stage PM remains controversial. This prospective two-center study assessed adjuvant HIPEC in CRC patients at high risk for metachronous PM (www.​clinicaltrials.​gov NCT02575859).

Methods

During 2006–2012, a total of 22 patients without systemic metastases were prospectively enrolled to receive HIPEC simultaneously with curative surgery, plus adjuvant systemic chemotherapy (oxaliplatin/irinotecan-containing ± biologics), based on primary tumor-associated criteria: resected synchronous ovarian (n = 2) or minimal peritoneal (n = 6) metastases, primaries directly invading other organs (n = 4) or penetrating the visceral peritoneum (n = 10). A control group retrospectively included 44 matched (1:2) patients undergoing standard treatments and no HIPEC during the same period. The cumulative PM incidence was calculated in a competing-risks framework.

Results

Patient characteristics were comparable for all groups. Median follow-up was 65.2 months [95 % confidence interval (CI) 50.9–79.5] in the HIPEC group and 34.5 months (95 % CI 21.1–47.9) in the control group. The 5-year cumulative PM incidence was 9.3 % in the HIPEC group and 42.5 % in the control group (p = 0.004). Kaplan–Meier estimated 5-year overall survival (OS) was 81.3 % in the HIPEC group versus 70.0 % in the control group (p = 0.047). No operative death occurred. Grade 3–4 [National Cancer Institute Common Terminology Criteria for Adverse Events (NCI–CTCAE) version 4] morbidity rates were 18.2 % in the HIPEC group and 25 % in controls (p = 0.75). At multivariate analysis, HIPEC correlated to lower PM cumulative incidence [hazard ratio (HR) 0.04, 95 % CI 0.01–0.31; p = 0.002], and better OS (HR 0.25, 95 % CI 0.07–0.89; p = 0.039) and progression-free survival (HR 0.31, 95 % CI 0.11–0.85; p = 0.028).

Conclusion

Adjuvant HIPEC may benefit CRC patients at high-risk for peritoneal failure. These results warrant confirmation in phase III trials.

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