PMC9299084_01
Gastroscopy revealing a mass in the lower esophagus with rigid tissue.
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F1
Gastroscopy revealed a mass in the lower esophagus with rigid tissue (Figure 1).
Pathological examination revealing that the tumor was characterized by biphasic architecture consisting of cuboidal ductal cells (black arrow) and myoepithelial cells (red arrow) (200x).
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F2
Pathological examination revealed the tumor was characterized by biphasic architecture consisting of cuboidal ductal cells and myoepithelial cells (Figure 2).
On immunohistochemistry, the duct-forming epithelial cells were positive for cytokeratin 7 (200x).
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F3
On immunohistochemistry, the duct-forming epithelial cells were positive for cytokeratin 7 (Figure 3).
Outer cells positive for p63, suggesting a myoepithelial phenotype (200x).
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F4
The outer cells were positive for p40, p63 (Figure 4), and cytokeratin 5/6, suggesting a myoepithelial phenotype.
Ki-67 labeling index of about 20% (100x).
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F5
The Ki-67 labeling index was about 20% (Figure 5).