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A contrast-enhanced CT scan shows a 40 mm well-enhanced, round tumor that was located at the jejunum (arrow head).
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A contrast-enhanced computed tomography (CT) demonstrated a 40 mm well-enhanced, round tumor that was located at the jejunum (Fig. 1).
A single balloon enteroscopy revealed a large submucosal tumor with a central deep ulceration.
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Single-balloon enteroscopy revealed a large submucosal tumor with a deep central ulceration (Fig. 2).
The cut section of the gross specimen shows an intramural mass, which measures 40 x 40 mm. A depressed ulcerative lesion is identified.
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Macroscopically, the tumor formed a 40 x 40 mm white-colored homogenous mass (Fig. 3).
Microscopic findings show that spindle cells with dense nuclei proliferate intricately, forming short fascicles.
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Microscopically, a solid region of the resected tumor showed a spindle-cell appearance with positive staining for c-kit and negative staining for CD34, CEA, and CA19-9 (Fig. 4).
Immunohistochemically, the tumor was strongly positive for c-kit and negative for CA19-9 and CEA. The MIB-1 labeling index was <10 %.
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The mitotic count was 30/50 high-power fields (HPFs) and the MIB-1 labeling index was <10 % (Fig. 5).