PMC4714491_01
a Tumor present in the submucosal region of the stomach (hematoxylin and eosin x100). b Interlacing bundles of spindle cells had elongated palisading nuclei with ill-defined cytoplasmic borders (hematoxylin and eosin x200). c Close-up showing mild nuclear pleomorphism with spindled-shaped nuclei and hypocellular regions (hematoxylin and eosin x400)
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PMC4714491_01_13256_2015_788_Fig1_HTML.jpg
Fig1
Mitotic activity 5/50 high-power fields were seen; however, no necrosis/atypical mitosis were identified (Fig. 1).
a Immunohistochemistry showed strong S-100 positivity. b Immunohistochemistry showed c-Kit negativity
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PMC4714491_01_13256_2015_788_Fig2_HTML.jpg
Fig2
Immunohistochemistry (IHC) staining was strongly positive for vimentin and S-100 (Fig. 2a), whereas c-Kit (Fig. 2b), SMA and cytokeratin (CK) were negative.