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  Indian J Med Microbiol
 

Figure 2: (a) Cell block preparation showing adenocarcinoma (H and E ×200), positive for TTF-1 and negative for p40 (IHC ×200). (b) Cell block preparation showing squamous cell carcinoma (H and E ×200), positive for p40 and negative for TTF-1 (IHC ×200)

Figure 2: (a) Cell block preparation showing adenocarcinoma (H and E ×200), positive for TTF-1 and negative for p40 (IHC ×200). (b) Cell block preparation showing squamous cell carcinoma (H and E ×200), positive for p40 and negative for TTF-1 (IHC ×200)