Diagnosis of Pancreatic Cancer CT or magnetic resonance imaging / magnetic resonance cholangiopancreatography (MRI / MRCP), followed by endoscopic ultrasonography CA 19 - 9 antigen to follow (not for screening) The preferred tests are an abdominal helical CT using pancreatic technique or MRI / MRCP; these are followed by endoscopic ultrasonography with fine-needle aspiration (EUS / FNA) for tissue diagnosis and to assess surgical resectability.