2019 Volume 61 Issue 5 Pages 1115-1122
A 54-year-old man was admitted to our hospital for examination and treatment of a duodenal elevated lesion. Esophagogastroduodenoscopy revealed a submucosal tumor with a diameter of about 20mm located at the duodenal main papilla. Endoscopic ultrasonography showed a 20×17 mm, hypoechoic tumor that was located in the submucosa without any sign of invasion to adjacent structures. We observed no lymph node nor distant metastases in any images. Accordingly, we performed endoscopic snare papillectomy in this patient. After excision, pathological examination revealed that this tumor was a gangliocytic paraganglioma (GP) and that we had removed the tumor completely. Because of its benign nature, we should remove GP by a less invasive therapy such as endoscopic papillectomy for complete biopsy. To our knowledge, reports on GP excised endoscopically are rare; therefore, we report this case.
