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Figure 2: (a) Adenocarcinoma with acinar pattern (H and E, ×40). (b) The tumor cells show nuclear TTF1 expression (×40). (c) Fluorescent in situ hybridization result showing split red and green signals (arrow) and one fused yellow signal (Oil, ×100)

Figure 2: (a) Adenocarcinoma with acinar pattern (H and E, ×40). (b) The tumor cells show nuclear TTF1 expression (×40). (c) Fluorescent in situ hybridization result showing split red and green signals (arrow) and one fused yellow signal (Oil, ×100)