Impact of Alcian blue and periodic acid Schiff expression on the prognosis of gastric signet ring cell carcinoma

Figure 4 Cancer-specific survival in the different groups. A: 3-year cancer-specific survival (CSS) of all patients with gastric signet ring cell carcinoma (SRCC); B: 3-year CSS of all patients grouped according to tumor diameter (P = 0.002); C: 3-year CSS of all patients grouped according to the degree of periodic acid-Schiff (PAS) expression (P = 0.000); D: 3-year CSS of patients with SRCC in an advanced stage grouped according to the degree of PAS expression (P = 0.003). PAS: Periodic acid-Schiff.