STON2 and neoplasm: In a univariate Cox analysis, the STON2 protein level (p < 0.001), CA153 (p = 0.001), CA199 (p = 0.009), intraperitoneal metastasis (p < 0.001), intestinal metastasis (p < 0.001), ascites with tumor cells (p = 0.001), neoadjuvant chemotherapy (p = 0.014), intraperitoneal recurrence (p < 0.001), and platinum resistance (p < 0.001) were significant prognostic factors (Table 4).