Figure 3From: Plasmacytoid myoepithelioma of minor salivary glands: report of case with emphasis in the immunohistochemical findings Immunohistochemical findings. Immunohistochemical study of tumor plasmacytoid cells revealed (a) strong positivity for S-100 protein, (b) moderate immunoreactivity for vimentin, and (c) focal immunoreactivity for GFAP, (d) Tumor cells failed in immunostaining for α-SMA, although the muscular walls of the blood vessels (positive control) were positive (Streptavidin-Biotin Complex, 100×).Back to article page