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Immunohistochemical stainings on stage 4S neuroblastomas. A: Tumor expressing MYCN protein with a strong and heterogeneous staining pattern, B: Tumor expressing MYCN protein with a moderate and uniform staining pattern, C: Tumor expressing MYC protein, D: Tumor expressing no MYC-family protein expression (D-1: MYCN staining, D-2: MYC staining). BD: bile duct positively stained for this marker. Note: MYCN staining without counter staining and MYC staining with Hematoxylin staining.
