Saline-immersion therapeutic endoscopy (SITE) combined with endoscopic submucosal dissection (ESD) of a rare cause of intussusception: a giant Brunner gland adenoma

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A 48-year-old woman was referred to our institution due to abdominal pain and an episode of melena. At esophagogastroduodenoscopy (EGD) an 60-mm pedunculated lesion (Paris 0-Ip) was identified. The lesion was arising from the duodenal aspect of the pyloric ring ([ Fig. 1 ], [ Fig. 2 ]) and prolapsing into D3. Computed tomography showed duodenal thickening with areas of fat tissue that could represent a lipoma or a liposarcoma. A scheduled therapeutic EGD was performed under general anesthesia with surgical backup on standby. The scope was retroflexed in the bulb to ensure direct visualization of the lesion’s stalk and saline-immersion therapeutic endoscopy (SITE)-facilitated endoscopic submucosal dissection (ESD) was performed ([ Fig. 3 ], [ Video 1 ]). After resection, tip-of-the-knife coagulation was applied prophylactically to cauterize any visible vessels. No intraprocedural or postprocedural complications occurred. Fig. 1 Pedunculated lesion arising from the pyloric ring in a 48-year-old woman referred because of abdominal pain and melena. Fig. 2 Saline-immersion therapeutic endoscopy (SITE) facilitated endoscopic submucosal dissection (ESD). Fig. 3 The retrieved specimen. Video 1 Saline-immersion therapeutic endoscopy (SITE) facilitated endoscopic submucosal dissection (ESD) of a giant Brunner gland adenoma. Quality: mobile 360 480 720 Download Histopathological analysis revealed a Brunner gland adenoma (BGA) without any evidence of dysplasia or malignant components ([ Fig. 4 ], [ Fig. 5 ]); sections of the polyp showed nodules of Brunner glands in the submucosa and extending into the underlying adipose tissue. These findings were in keeping with a diagnosis of a giant BGA measuring 60 × 34 × 24 mm. BGAs are very rare benign duodenal tumors proliferating from normal Brunner glands. BGAs represent about 5 % – 10 % of benign duodenal tumors and have an estimated incidence of less than 0.01 % [1, 2]. Patients are usually asymptomatic and these lesions can present as incidental findings during EGD or imaging. Nonspecific gastrointestinal symptoms including abdominal pain, nausea, and bloating have been reported. Gastrointestinal bleeding, iron deficiency anemia, and obstructive symptoms have also been described in rare cases [3, 4]. To date, a consensus for the optimal management of giant BGA is lacking. Surgical and endoscopic management have been reported depending on lesion size and local expertise. Careful endoscopic resection appears to be effective, minimally invasive, and safe even for giant lesions. Fig. 4 Histopathology image showing no evidence of dysplasia or malignant components. Fig. 5 Histopathology image showing nodules of Brunner glands in the submucosa and extending into the underlying adipose tissue. Endoscopy_UCTN_Code_TTT_1AO_2AG Endoscopy E-Videos https://eref.thieme.de/e-videos Endoscopy E-Videos is a free access online section, reporting on interesting cases and new techniques in gastroenterological endoscopy. All papers include a high quality video and all contributions are freely accessible online. This section has its own submission website at https://mc.manuscriptcentral.com/e-videos Publication History Article published online: 19 June 2020 © 2020. Thieme. All rights reserved. Georg Thieme Verlag KG Rüdigerstraße 14, 70469 Stuttgart, Germany

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