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SEM images of the cancer cell surfaces with and without lanthanum staining (A) Urothelial carcinoma, HE staining; (B) Urothelial carcinoma examined using SEM; (C) Small-cell carcinoma, HE staining; (D) Small-cell carcinoma examined using SEM. “With lanthanum nitrate” indicates the GCX depiction. “Without lanthanum nitrate” indicates that the GCX is not captured. White arrows indicate individual cancer cells. White arrowheads indicate microvilli. Scale bars = 100 μm.
