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mRNA-ISH of TBB case No. 6 (with a KRAS mutation). Micrograph of mRNA-ISH of TBB No. 6. Several dots are observed (arrows) in tumor cells, but no clusters were seen (original magnification ×400). Scale bar: 200 μm. ISH, in situ hybridization; TBB, transbronchial-biopsied.
