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By Steffen Rickes

ISBN-10: 380557777X

ISBN-13: 9783805577779

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Copyright © 2004 S. Karger AG, Basel Introduction The differentiation of pancreatic tumors is difficult by imaging techniques. Histology is the standard of reference but can produce false results. Endoscopic retrograde (ERCP) and magnetic resonance cholangiopancreatography (MRCP) are the current imaging standards for differential diagnosis of pancreatic lesions [1–5]. With conven- ABC © 2004 S. 70% [6–9]. Echo-enhanced sonography is a procedure with good results in the differentiation of liver lesions [10–15].

On the portal venous phase image (c), the tumor appears hypoattenuating relative to liver parenchyma. 7/60) (d), the tumor is visualized as area with a higher signal than the surrounding liver parenchyma due to decreased uptake of SPIO in the tumor (arrowhead). Fig. 7. Metastatic liver tumor (rectal cancer) in a 53-year-old woman. On unenhanced CT (a), the tumor shows low attenuation (arrow). On the arterial phase CT (b), the tumor margin is enhanced in the form of a ring (arrowhead). On the portal venous phase CT (c), the tumor appears hypoattenuating relative to liver parenchyma.

Dig Surg 2000;17:468–474. 30 Dig Dis 2004;22:26–31 6 Becker D, Strobel D, Bernatik T, Hahn EG: Echo-enhanced color- and power-Doppler EUS for the discrimination between focal pancreatitis and pancreatic carcinoma. Gastrointest Endosc 2001;53:784–789. 7 Furukawa T, Tsukamoto Y, Naitoh Y, Hirooka Y, Hayakawa T: Differential diagnosis between benign and malignant localized stenosis of the main pancreatic duct by intraductal ultrasound of the pancreas. Am J Gastroenterol 1994;89: 2038–2041. 8 Wiersema MJ, Kochman ML, Cramer HM, Tao LC, Wiersema LM: Endosonographyguided real-time fine-needle aspiration biopsy.

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Advanced Imaging Modalities by Steffen Rickes

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