
Nicholas J. Talley , Kenneth R. Devault, Michael B. Wallace, Bashar A. Aqel, Keith D. Lindor
There is a hypoechoic mass in the pancreatic head. The needle is seen entering the mass. It is moved back and forth to obtain material. GDA, gastroduodenal artery; SMA, superior mesenteric artery; SMV, superior mesenteric vein.