case_images: PMC10725679_01
case_images: Gastroscopy and abdominal CT images of this patient. (A and B) Gastroscopy showed the tumor protruded from the gastric cavity with superficial ulceration; (C and D) Abdominal CT and contrast-enhanced CT revealed multiple liver hypodensity nodules.
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case_images: CT scan of the abdomen revealed multiple hepatic metastatic lesions, which increased compared with previous ones (Figure 1). 
case_images: Histomorphological and immunohistochemical results of gastroscopy biopsy in our hospital. (A-C) At the low magnification, the sheet-shaped atypical cells were observed, at the higher magnification, these atypical cells were composed of round and oval cells, with eosinophilic cytoplasm, and a few vacuoles in the cytoplasm; (D-F) immunohistochemical results showed the tumor cells were negative for CK-pan (D), and were positive for CD117 (E) and DOG1 (F) [figures magnification: A,40x; C,400x; other figures,100x].
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case_images: Microscopically, gastroscopic biopsy showed sheet-like atypical cells composed of round and oval cells, with eosinophilic cytoplasm, and a few vacuoles can be seen in the cytoplasm (Figure 2A-C).  Finally, positive immunohistochemical results for CD117, DOG1, and CD34 supported a diagnosis of epithelioid GIST (Figure 2D-F).
case_images: Histomorphology and immunohistochemistry results of consultation sections. (A-C) The consultation sections showed sheets of epithelioid cells in the submucosa, and vacuolization was seen; (D-F) the immunohistochemical results showed the tumor cells were negative for CK-pan (D), and were positive for CD117 (E), DOG1 (F) [figures magnification: A,40x; C,400x; other figures,100x].
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case_images: Immunohistochemical results showed the tumor cells were positive for CD117, DOG1, and SDHB, while were negative for CK-pan (Figure 3).