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Immunohistochemistry for beta-catenin. (A) (B) Nuclear and cytoplasmic localization in urothelial, squamous and “transitional” cells in the present bladder tumor (A) and in basaloid cells in cutaneous pilomatricoma (B). Shadow cells (asterisks) are negative in both tumors. (C) Membranous localization in the squamous component of bladder carcinoma (different case from the present one).
