Moreover, DSS data analysis presented in Figure 6 reflected associations between low GPC2 expression and poor prognosis in patients with BLCA (p = 0.001), PAAD (p  = 0.002), HNSC (p = 0.007), KIRP (p = 0.013), LGG (p = 0.015), and ESCA (p = 0.047); however, in patients with other 8 types of cancer, GPC2 expression exhibited the opposite relationship with prognosis. Here, GPC2 is linked to cancer.