PMC3168574_01
Endoscopic photograph demonstrating a yellowish submucosal tumor in the cecum.
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fig1
Colonoscopy revealed a polypoid mass measuring approximately 0.7 cm in diameter (Figure 1).
Low magnification view of submucosal tumor arranged in nodules and sheets (H&E x 4).
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fig2
These nodules or sheets were surrounded by variable stroma (Figure 2).
Histological findings of the tumor showing positive immunoreaction for S-100 protein (immunohistochemical  stain x 400).
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fig3
Immunohistochemical analysis showed that the tumor cells expressed S-100 protein as well (Figure 3).