EUS=endoscopic ultrasound. Bx=biopsy. EUS guided biopsy is much safer than percutaneus approach for pancreas. I suspect they did ct scan and saw multiple cysts in the pancreas, which can be benign cyst or pseudo cyst, but can also be ipmn, which are typically slow growing, mri is the diagnostic study of choice. Doing a whipple's procedure for unknown diagnosis is rather aggressive, and have dental implant is not an absolute contraindications for MRI, unless thats the case in china. shop around and see if anyone else can do a MRI for him.