Microscopic view (high power view; in situ hybridization): In situ hybridization is a method of localizing and detecting specific DNA and mRNA sequences by hybridizing the complementary nucleic acid strand known as a nucleotide probe to the sequence of interest when it is present in tissue sections. This method is used to detect EBER（Epstein-Barr encoded RNAs）in cases of nasopharyngeal carcinoma (nucleus shows blue staining). Epstein-Barr virus infection is more common in non-keratinizing than in keratinizing nasopharyngeal carcinoma.

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