A case of an elderly patient who underwent esophagogastroduodenoscopy for neuroendocrine tumor in the duodenal bulb

A male in his 90s underwent esophagogastroduodenoscopy (EGD) for upper abdominal pain, which revealed a submucosal tumor-like elevated lesion on the anterior wall of the duodenal bulb. A biopsy identified a neuroendocrine tumor (NET) (G1). Despite his advanced age, contrast-enhanced computed tomography confirmed the absence of metastases, and we performed endoscopic submucosal dissection (ESD). Although the abundant Brunner's glands made submucosal dissection difficult, we completed ESD without complication. Pathology results showed a NET (G1), 7×5 mm, v0, ly0, HM0, VM1. We followed the patient without additional surgical treatment.