case_images: PMC11806460_01
case_images: Preoperative abdominal computed tomography images. (a) Axial scan showing a "target" soft tissue mass in the duodenum. (b) Coronal reformat illustrating the leading point of the intussusception extending to the junction of the second and third parts of the duodenum and (c) Sagittal reconstruction demonstrating intussusception of the gastric wall into the duodenum.
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case_images: She was admitted to the gastroenterology department for rehydration and blood transfusion to investigate the etiology further and underwent abdominal CT, which showed a heterogeneous, nonobstructing mass in the stomach extending into the second and third parts of the duodenum (Figure 1).
case_images: Endoscopic findings. (a) Image showing invagination of the gastric antrum into the duodenum. (b) The submucosal polypoid mass, along with the gastric wall, passing through the pylorus into the second part of the duodenum. (c) Image of endoscopic partial reduction of the antrum wall and (d) Retrograde distal view after endoscopic partial reduction.
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case_images: Gastroscopy was repeated to assess the feasibility of endoscopic treatment and determine the tumor's origin and nature, revealing a large polypoid mass originating from the anterior wall of the gastric antrum and protruding past the pylorus into the second part of the duodenum (Figure 2).
case_images: Intraoperative findings and resection. (a) The gastric wall and palpable mass at the greater curvature of the gastric antrum invaginating through the pylorus into the duodenum. (b) Anterior gastrostomy exposing the mass for safe wedge resection and (c) Wedge resection of the tumor with secure margins.
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case_images: Wedge resection of the gastric tumor with a 2-cm margin was performed (Figure 3).
case_images: Pathological findings. (a) Hematoxylin and eosin section showing a spindle cell neoplasm (x200) and (b) representative immunohistochemistry for CD117, CD34, DOG1, SMA, and desmin (x200).
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case_images: Histopathology and immunohistochemistry confirmed the diagnosis of gastric leiomyoma (Figure 4).