However, neither serum exosomal nor serum GPC-1 could distinguish PDAC from CP and BPT (Figure 3C; AUCs of 0.568, P = 0.427, 95% CI 0.406-0.730, and 0.615, P = 0.181, 95% CI 0.442-0.788, respectively). Here, GPC1 is linked to benign breast phyllodes tumor.