The GU‐Uro tumours differed from Uro tumours by increased proliferation, immune and extracellular matrix (ECM) mRNA signatures, but protein expression levels of the canonical Uro genes FGFR3, CCND1 and TP63 were not different in the Uro versus GU‐Uro groups of tumours (supplementary material, Figure S2). This evidence concerns the gene FGFR3 and neoplasm.