case_images: PMC11016259_01
case_images: Abdominal computed tomography shows a slightly high-density heterogeneous mass of 9.3 * 5.9cm in the small intestine, with a density ranging from 34 to 57HU, indicated by yellow arrows (a). Enhanced scanning shows mild heterogeneous enhancement of the tumor, indicated by blue arrows (b).
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case_images: Abdominal computed tomography and enhanced imaging showed a 9.3 * 5.9cm abdominal mass, multiple metastases in the abdominal cavity, peritoneum, and diaphragmatic pleura, and fluid accumulation around the spleen, abdominal cavity, and pelvic cavity (Figure 1).
case_images: During the operation, a dark red mass was found on the left side of the upper abdomen, with some of the greater omentum adhering to it. It was approximately 90 cm away from the Treitz ligament and was approximately 10 * 6cm in size (yellow arrows).
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case_images: Multiple small nodules can be seen in the greater omentum and parietal peritoneum (Figure 2).
case_images: The lesion is located in the empty mesangium, with spindle shaped tumor cells and obvious atypia, indicated by yellow arrows (a). Tumor cells surround irregular blood vessel cavities, with green arrows (b and c). Some areas of the tumor show bleeding foci, indicated by blue arrows (d).
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case_images: Some areas were anastomotic, with spindle shaped tumor cells and obvious atypia (Figure 3).
case_images: Immunohistochemical staining showed that tumor cells expressed CD31(a), CD34(b), Fli-1(c), MDM2(d), ERG(e), and INI1(f).
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case_images: Immunohistochemical staining showed that tumor cells expressed CD31, CD34, Fli-1, MDM2, ERG, and INI1 (Figure 4).