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(a) Nuclear suprabasal beta-catenin (β-catenin) staining expression in all layers of epidermis except the parakeratotic and cornified layers of a psoriasis lesion (Immunoperioxedase stain, ×400). (b) Strong nuclear with membranous β-catenin expression and negative expression in the parakeratotic layer of a psoriasis lesion (Immunoperioxedase stain, ×400)
