Gastroduodenal intussusception due to gastric schwannoma treated by billroth II distal gastrectomy: One case report

Figure 1 Computed tomography scan revealed a gastroduodenal intussusception of the gastric tumor. The red arrow marks the duodenum. The red arrowhead marks the tumor in the duodenum.

Figure 2 Indentation at the antrum, the origin of intussusception.

Figure 3 Macroscopic view of the resected specimen shows a lobulated polypoid gastric tumor measuring 50 mm × 50 mm × 48 mm, located at the gastric antrum, which did not infiltrate the mucosa.

Figure 4 Pathological analysis of the gastric mass confirmed a gastric schwannoma through positive immunohistochemical staining for S-100 protein and vimentin, whereas CD117, CD34, β-catenin, smooth muscle actin, synaptophysin, chromogranin and desmin were negative. A: The tumor showed typical features of a spindle cell tumor with moderate nuclear pleomorphism but no mitotic activity (original magnification: × 200); B: S-100 protein immunostaining demonstrated strong nuclear and cytoplasmic immunoreactivity; C: Vimentin protein immunostaining demonstrated strong cytoplasmic immunoreactivity.