Is the measurement of sarcopenia associated with oncological disease in patients undergoing cytoreductive surgery and hyperthermic intraperitoneal chemotherapy?

BackgroundPeritoneal malignancies are challenging cancers to manage. While cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (CRS and HIPEC), may offer a cure, it is a radical procedure associated with significant morbidity. Pre-emptive identification of deconditioned patients for optimization may mitigate surgical risk. However, the difficulty lies in identifying a cost-effective predictive tool. Recently, there has been interest in sarcopenia, which may occur due to malignancy. The purpose of this study was to assess the utility of sarcopenia at predicting post-operative outcomes. MethodsA quaternary-centre retrospective study of CRS and HIPEC patients (2017-2020), were conducted to determine the association between pre-operative sarcopenia on oncological (peritoneal carcinomatosis index (PCI)) and surgical outcomes (complications). Sarcopenia from lumbar CT-images were measured using Slice-o-matic (TM). Statistical differences were analysed using Mann-Whitney U and Chi-squared test. ResultsCohort analysis (n=94) found 40% had sarcopenia, majority were female (53.2%), and average age of 55years. The major pathologies was colorectal cancer (n=39, 41.5%), appendix adenocarcinoma (n=21, 22.3%), and pseudomyxoma peritonei (PMP) (n=19, 20.2%). Sarcopenia was associated with decreased weight, 72.7 versus 82.2kg (P=0.014) and shorter survival, 1.4 versus 2.1years (95% CI, 1.09-3.05, P=0.032). Median PCI (excluding PMP) was 11 (6-18) and median PCI (only PMP) was 25 (11-32). Post-operatively, sarcopenia patients experienced more complications (72.5% vs. 64.8%, P=0.001). ConclusionPre-emptive identification of sarcopenia may be a useful prognostic indicator and predictor of post-operative outcomes in CRS and HIPEC. For oncological patients, sarcopenia may be an indicator of patients requiring targeted pre-operative rehabilitation, or advanced disease requiring further treatment.