Fig. 1

Study schematic. A total of 527 PMP patients whose first-time standard CRS + HIPEC performed in our center were retrieved between June 1, 2013, and August 23, 2023. Patient combined with other tumors (n = 4), received systemic chemotherapy before CRS (n = 29), incomplete surgery record (n = 4), and with PSS ≥ 2 (PSS = 2, n = 68; PSS = 3, n = 56) were all excluded. Finally, 366 PMP patients were included, including 266 low-grade and 100 high-grade subjects. PMP, pseudomyxoma peritonei; CRS, cytoreductive surgery; HIPEC, hyperthermic intraperitoneal chemotherapy; PSS, prior surgical score