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. 2019 Jun 1;12(6):2288–2292.

Figure 1.

Figure 1

A. The tonsil neoplastic cells had diffuse distribution with abundant cytoplasm and prominent nucleoli (Original magnification ×200, scale bar 300 μm). B. The histologic morphology of lung tumor tissue was similar to that of tonsil. (Original magnification ×200, scale bar 300 μm). C. Immunohistochemical results showed that tonsil neoplastic cells were positive for broad spectrum CK (Original magnification ×200, scale bar 300 μm). D. Few tonsil neoplastic cells were positive for CK5/6 (Original magnification ×200, scale bar 300 μm). E. ALK P80 was strongly positive in tonsil neoplastic cells (Original magnification ×200, scale bar 300 μm). F. TTF-1 was diffusely positive in tonsil neoplastic cells (Original magnification ×200, scale bar 300 μm).