To clarify the clinical significance of NCL in BC, we evaluated NCL expression with a BC tissue array slide, including non‐invasive papillary bladder carcinoma (NIPBC), invasive non‐papillary bladder carcinoma (INPBC), squamous bladder cancer (SBC), non‐invasive non‐papillary bladder carcinoma (NINPBC) and normal tissue (NT), from BC patients by immunohistochemical (IHC) analysis. Here, NUCLEOLIN is linked to breast cancer.