Analysis of papillary urothelial carcinomas of the bladder with grade heterogeneity: supportive evidence for an early role of CDKN2A deletions in the FGFR3 pathway

Aims The dual pathway model of urothelial carcinogenesis does not fully explain grade and stage progression in patients with initial low‐grade, non‐muscle invasive urothelial carcinomas. Fibroblast growth factor receptor 3 (FGFR3) mutations are a hallmark of the low‐grade pathway, with subsequent pr...

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