Given the heterogeneity of patient

Given the heterogeneity of patient and tumor factors, there has been great interestin developing prognostic nomograms and scoring systems for prediction ofsurvival to assist in decision-making. The Peritoneal Surface Disease SeverityScore (PSDSS) was introduced by Pelz et al. and developed by theAmerican Society of Peritoneal Surface Malignancies . The PSDSS represents abasis of stratifying patients according to the severity of their peritoneal diseasescored on a 3-point scale that consists of three prognostic factors: clinical symptoms, preoperative CT scan-based PCI score, lymph node status, and histologicalsubtype (Table 2)