@mariouk Not being a medical authority here, I can only tell you what was done for my husband. He had the EUS, the standard diagnosis tool, to visualize the cysts within the pancreas and determine if there was nearby spread of tumor or vessel involvement—in other words to know if he was a candidate for surgery. He actually had two EUSs prior to surgery. At the first one, the physician chose not to do a fine needle aspiration biopsy I believe because with the size and appearance of his cysts it was a given that he needed surgery and she did not want to unnecessarily risk the chance of pancreatitis that attends this invasive procedure. The surgeon afterward decided he did in fact want the additional information of a biopsy so he underwent a second EUS with fine needle aspiration biopsies. Because his malignancy was early and the cyst wasn’t fully enveloped with cancer cells the random punctures no doubt missed it. I understand that if a person has jaundice and hence, suspected obstruction of ducts, then an ERCP Is performed so that a stent could be placed. No such jaundice or situation was present for my husband. Hope this helps. I understand your wish to understand as much as you can, especially so you know what questions you want to ask. It is apparent you wish to be included as an active member of your care team, I hope your physicians understand this. I also suspect with a bit of time, you will reach a level of comfort with the information you have, and you will feel more settled.