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a Immunohistochemistry for CD138 (original magnification ×200) shows strong membranous immunoreactivity of the neoplastic cells, but no reactivity in the remaining salivary gland acini. b In situ hybridization for Epstein-Barr virus-encoded RNA (EBER; original magnification ×200) shows strong nuclear signals in almost every tumor cell, but not in the background salivary gland acini
