The efficacy of endoscopic ultrasound for preoperative diagnosis of epidermoid cyst in an intrapancreatic accessory spleen: a case report

Cystic lesions arising from the intrapancreatic accessory spleen are relatively rare and often difficult to diagnose preoperatively. Identifying the intrapancreatic accessory spleen is important to preoperatively diagnose epidermoid cyst. In present cases, the intrapancreatic accessory spleen component located in the surgical specimen clearly matched with Endoscopic Ultrasonography (EUS) image findings, which can be clue for the preoperative diagnosis of epidermoid cyst in an intrapancreatic accessory spleen. Detailed evaluation by EUS was useful for preoperative diagnosis. In case of pancreatic cystic diseases, careful observation of the cystic lesion surrounding by EUS may lead to the preoperative diagnosis of epidermoid cyst and reduce surgery invasiveness.