Retroperitoneal Schwannoma: When EUS-Guided FNA can Avoid Surgery

Schwannomas are rare benign tumor that arises from peripheral or cranial nerve. Commonly, they occur into the head or neck and rarely into the retroperitoneum or pancreas. Usually they are asymptomatic tumor, discovered incidentally. Final diagnosis is generally confirmed after surgical intervention. The possibility to reach the lesion by EUS and to perform FNA can avoid invasive procedures. Here we discuss a rare case of retroperitoneal schwannoma diagnosed by Endoscopic ultrasound (EUS) guided Fine needle aspiration (FNA).