A Rare Case of a Primary Squamous Cell Carcinoma of the Stomach Presenting as a Submucosal Mass

Figure 3

(a) Histopathological examination showing a moderately differentiated squamous cell carcinoma with keratinization (×100). Keratin pearl (black arrow). Mosaic cell arrangement with sharp border (red arrow). (b) Tumor invasion of the diaphragm (×100) (red arrow). (c) Lymphovascular invasion is present (×40) (black arrow). (d) Tumor with nerve invasion (×40) (black arrow).

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