In addition, different molecular subtypes of NMIBC that showed diverse clinical behaviors, ‘urothelial-like A’, ‘urothelial-like B’, and ‘squamous cell carcinoma-like’, as suggested by Sjodahl et al., included tumors with CK5/6-high/CK20-low IHC staining [1,33,34], which was representative of group 1. Here, KRT20 is linked to squamous cell carcinoma.