Figure 3From: Lipomatous apocrine adenoma with syringocystadenoma papilliferum arising from the external auditory canalImmunohistochemical studies revealed bilayer different lining cells. Positivity for cytokeratin-7 (Figure 3A) and GCDFP-15 (Figure 3B) in the inner layers of cylindrical cells of the tubules were shown. Positivity for p63 (Figure 3C) and S-100 protein (Figure 3D) in the outer layers of cuboidal or flattened cells with myoepithelial differentiation were shown. (Immunohistochemical stain, original magnification × 100).Back to article page