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. 2020 Dec 3;12(12):e11870. doi: 10.7759/cureus.11870

Figure 3. IHC stains of the first case.

Figure 3

(A) CD56: focally positive. (B) CD99: strong and diffuse membranous positivity in tumor cells. (C) Chromogranin: focally stains positive. (D) CK5/6: highlights myoepithelium of normal duct and stains tumor cells. (E) CK7: negative staining in tumor cells and positive in normal salivary duct. (F) Ki67: positive in more than 20%. (G) P16: nuclear and cytoplasmic positive staining in more than 75% of tumor cells. (H) P63: diffuse positive staining in tumor cells surrounding normal ducts. Some positive staining is also seen in myoepithelial cells. (I) PGP9.5: positive. (J) Synaptophysin: weakly positive. IHC, immunohistochemistry.