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  Indian J Med Microbiol
 

Figure 2: Microscopy: (a) Pseudostratified, ciliated, columnar epithelial lining (H and E, ×400). (b) Closely packed tumor cells in acinar and glandular patterns. Adjacent hypocellular stroma with embedded blood vessels (H and E, ×100). (c) Tumor cells showing pale, eosinophilic cytoplasm and basally located nuclei with stippled chromatin (H and E, ×400). (d) Myxoid stroma having mild, lymphoplasmacytic infiltrate (H and E, ×100). (e and f) PAS and AB stain–highlight mucoid material (H and E, ×400). (g) Diffuse pan-CK positivity (IHC, ×100). (h) Vimentin diffusely positive (IHC, ×100). (i) Focal S-100 positivity (IHC, ×100)

Figure 2: Microscopy: (a) Pseudostratified, ciliated, columnar epithelial lining (H and E, ×400). (b) Closely packed tumor cells in acinar and glandular patterns. Adjacent hypocellular stroma with embedded blood vessels (H and E, ×100). (c) Tumor cells showing pale, eosinophilic cytoplasm and basally located nuclei with stippled chromatin (H and E, ×400). (d) Myxoid stroma having mild, lymphoplasmacytic infiltrate (H and E, ×100). (e and f) PAS and AB stain–highlight mucoid material (H and E, ×400). (g) Diffuse pan-CK positivity (IHC, ×100). (h) Vimentin diffusely positive (IHC, ×100). (i) Focal S-100 positivity (IHC, ×100)