• L G E M Razenberg, Y R B M van Gestel, G-J Creemers, V J Verwaal, V E P P Lemmens, and I H J T de Hingh.
• Department of Oncology, Catharina Hospital, Eindhoven, The Netherlands; Eindhoven Cancer Registry/Netherlands Comprehensive Cancer Organisation (IKNL), Eindhoven, The Netherlands.
• Eur J Surg Oncol. 2015 Apr 1;41(4):466-71.

BackgroundPopulation-based data on the percentage of colorectal cancer (CRC) patients with synchronous peritoneal carcinomatosis (PC) being treated with cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) are currently lacking. The current population-based study describes trends in the use of CRS-HIPEC in the Netherlands, one of the first countries where CRS and HIPEC was introduced.MethodsAll patients diagnosed with synchronous PC of CRC between 2005 and 2012 were extracted from the Netherlands Cancer Registry (n = 4623). Patients with primary appendiceal cancer were excluded resulting in a study population of 4430 patients. Trends in the use of CRS-HIPEC over time were analyzed by means of a Cochrane-Armitage trend test. Survival proportions were calculated as the time between diagnosis and date of death or last follow-up (January 2014).ResultsOf the total 4430 patients with synchronous PC, 297 (6.4%) underwent treatment with CRS-HIPEC. The proportion of colorectal PC patients receiving CRS-HIPEC increased significantly over time from 3.6% in 2005-2006 to 9.7% in 2011-2012 (p < 0.0001). Overall median survival (MS) for patients treated with CRS-HIPEC was 32.3 months, whereas MS rates were respectively 12.6, 6.1 and 1.5 for months palliative chemotherapy with/without surgery, palliative surgery and best supportive care.ConclusionThe proportion of patients diagnosed with synchronous PC from CRC treated with CRS-HIPEC has increased significantly over time and currently almost 10% of PC patients are treated with CRS-HIPEC. Median survival in this population based group is 32.3 months.Copyright © 2015 Elsevier Ltd. All rights reserved.

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