PMC4802801_01
PMC4802801_02
Abdominal X-ray showing the presence of air-fluid levels
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Abdominal x-ray evidenced air-fluid levels (Figure 1).
Macroscopic appearance of GIST in small bowel diverticulum
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A left hemicolectomy and diverticulectomy were performed (Figure 2).
Mucinous adenocarcinoma of the sigmoid (HE stain, ob. x 20)
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The tumor of the colon was mucinous adenocarcinoma pT3N1 (Figure 3).
Fusiform low grade GIST: (A) invasion of submucosa of small intestine from GIST (HE stain, ob. x 10); (B) the GIST was composed of fascicles of spindle cell with no atypia (HE stain, ob. x 40)
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GIST: strong positive CD117 immunostaining (ob. x 40)
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The immunohistochemistry indicated strong staining for ckit/CD117 (Figure 5) and CD34 (Figure 6) while the expression of smooth muscle actin, desmin and S100 protein were negatives.
GIST: CD34 positivity (ob. x 40)
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The immunohistochemistry indicated strong staining for ckit/CD117 (Figure 5) and CD34 (Figure 6) while the expression of smooth muscle actin, desmin and S100 protein were negatives.