RT Book, Section A1 McNabb-Baltar, Julia A1 Swanson, Richard A2 Greenberger, Norton J. A2 Blumberg, Richard S. A2 Burakoff, Robert SR Print(0) ID 1119988782 T1 Tumors of the Pancreas T2 CURRENT Diagnosis & Treatment: Gastroenterology, Hepatology, & Endoscopy, 3e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9780071837729 LK accessmedicine.mhmedical.com/content.aspx?aid=1119988782 RD 2024/03/28 AB ESSENTIALS OF DIAGNOSISAbdominal protocol computed tomography (CT) with arterial and venous phases is generally the best initial modality for diagnosis and staging.Endoscopic ultrasound (EUS) is superior to CT in diagnosing small tumors, and can be used to obtain pathologic confirmation of the diagnosis.Fewer than 20% of tumors are resectable at the time of diagnosis.Carbohydrate antigen 19-9 (CA 19-9) and carcinoembryonic antigen (CEA) have a low specificity and sensitivity, but can be followed for treatment response if initially elevated.