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case_images: Endoscopy showing about 2-cm lobulated lesion with central depression at the second portion of duodenum (A). Endoscopic ultrasound shows an approximately 17 x 4.6 mm sized inhomogeneous hypoechoic lesion with a well-circumscribed margin that was thought to arise from the fourth layer (muscularis layer) (B). Three months later, there were no abnormalities or recurrences in the postoperative follow-up endoscopy (C).
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case_images: Gastroduodenoscopy revealed a duodenal subepithelial tumor (SET) measuring approximately 2 cm in the descending duodenum near the ampulla of Vater (AoV) (Fig. 1A). EUS revealed an inhomogeneous hypoechoic lesion with a well-circumscribed margin measuring approximately 17 x 4.6 mm, thought to arise from the muscularis layer (Fig. 1B). After 3 months, no abnormalities or recurrences were observed during postoperative follow-up examinations, including gastroduodenoscopy and CT (Figs. 1C, 2B).
case_images: Abdominal computed tomography revealing a 2.7 cm sized inhomogeneous enhancing mass with central necrosis in duodenal 2nd portion without enlargement of the surrounding lymph nodes (A). Six months later, there were no abnormalities or recurrences in the postoperative follow-up computed tomography (B).
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case_images: CT revealed an inhomogeneous enhancing mass with central necrosis (measuring approximately 2.7 cm) in the descending duodenum, suggesting that the GIST or NET was a subepithelial tumor without enlargement of the surrounding lymph nodes (Fig. 2A). After 3 months, no abnormalities or recurrences were observed during postoperative follow-up examinations, including gastroduodenoscopy and CT (Figs. 1C, 2B).
case_images: Surgical findings revealed an exoendophytic mass in the descending duodenum(A), laparoscopic wedge resection was performed on the duodenal wall, including the tumor during resection, the ENBD catheter was checked(B).
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case_images: Surgical findings revealed an exoendophytic mass in the descending duodenum (Fig. 3A). During resection, the ENBD catheter was checked to determine whether the PBD was damaged and the resection site was interrupted suture (Fig. 3B).
case_images: UGI series was showed to confirm that there was no anastomotic site leak (A), and an ENBD tubography was performed 2 days later to confirm that the PBD tract was undamaged (B).
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case_images: ENBD tubogram was performed 2 days later to confirm that the PBD tract was undamaged (Fig. 4B). ENBD was removed post-surgery because the tubography showed no specific findings in the CBD.