case_images: PMC9902681_01
case_images: Endoscopic submucosal dissection to remove the lesion. (A) An ulcerated lesion on the anterior wall side of the proximal antrum. (B) The lesion was marked using an endoscopic knife. (C) Dissection of the submucosal layer was performed. (D) A resected specimen.
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case_images: The lesion was successfully excised using ESD on the day after admission (Fig. 1).
case_images: (A, B) A 5-cm sized subepithelial lesion was observed on the posterior wall of the gastric antrum during the follow-up endoscopy.
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case_images: We observed a subepithelial lesion on the posterior wall of the gastric antrum, which was approximately 5 cm in diameter in the largest dimension (rolling sign, negative; cushion sign, positive) (Fig. 2).
case_images: (A, B) Computed tomography was performed after the subepithelial lesion was discovered. Hypodense wall thickening and a 5-cm sized heterogenous multilobular submucosal mass was observed in the gastric antrum. Local infiltration into the peripheral omentum was also observed.
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case_images: Abdominal CT showed hypodense wall thickening and a heterogeneous multilobular mass about 5 cm in size in the submucosal layer of the gastric antrum (Fig. 3), accompanied by local infiltration into the peripheral omentum.
case_images: Postoperative histological findings. (A, B) Acute suppurative gastritis with multifocal abscess formation and the infiltration of inflammatory cells in all layers of the stomach was seen (hematoxylin and eosin stain, x15 and x200).
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case_images: Acute suppurative inflammation with multiple abscess formation in the mural layers and omentum was diagnosed based on pathological findings of the specimen (Fig. 4).