Extraskeletal Ewing sarcoma of the stomach: A rare case report

Figure 1 Abdominal contrast-enhanced ultrasound. A: Hepatic arterial phase; B: Hepatic portal vein phase; C: Hepatic delay phase.

Figure 2 Contrast-enhanced abdominal computerized tomography. A: Hepatic arterial phase; B: Hepatic portal phase; C: Hepatic venous phase.

Figure 3 Esophagogastroduodenoscopy revealed that the gastric antrum mucosa was intact and smooth.

Figure 4  Postoperative pathological examination. A: Hematoxylin and eosin staining. The tumor was identified to originate from the serous layer of the stomach and involve the muscularis externa of the stomach (20 ×). Upper right inset indicates small round cells with different sizes (original magnification, 200 ×); B-F: CD99-positive, vimentin-positive, FLI-1-positive, NSE-positive, amd SYN-positive cells (immunohistochemistry staining, 200 ×).

Figure 5 Contrast-enhanced abdominal computerized tomography 11 mo postoperatively.