PMC6016216_01
Infused CT of the abdomen. (a) Circumferential thickening of the lower esophagus. (b) A large mass with peripheral enhancement and central necrosis most likely representing gastric GIST.
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fig1
The mass was highly suggestive of GIST based on CT; it was the same mass that was previously misdiagnosed as a liver hemangioma (Figure 1).
(a) Intraoperative photography of pedunculated gastric mass. (b) Gross examination of the mass, measures around 10 x 7 x 6 cm.
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fig2
Intraoperatively; a large (10 x 7 x 6 cm), extraluminal pedunculated mass was found at the posterior wall of the greater curvature of the stomach (Figure 2).
Microscopic examination of the gastric mass. (a) Epithelioid GIST of the stomach with rounded nuclei and a clear cytoplasm. (b) Epithelioid GIST strongly staining for DOG1.
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fig3
The mitotic rate of 6/50 HPF and immunohistochemical stains were positive for DOG1 and CD34 but negative for CD117 (c-Kit) (Figure 3).