[Retracted] A Novel Prognostic Stratified System Based on Tumor Budding and the Cell Nest Size in Ureter Urothelial Carcinoma

Figure 1

Morphologic features of ureter urothelial carcinoma (HE). (a, b) Tumor budding: (a) low budding and (b) high budding; (c) cell nest size: single-cell invasion; (d) CK immunohistochemical staining. Arrows represent tumor budding.

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