Cross-Sectional Imaging of the Abdomen and Pelvis: A by Khaled M. Elsayes PDF

By Khaled M. Elsayes

This e-book bargains concise descriptions of cross-sectional imaging reviews of the stomach and pelvis, supplemented with over 1100 top quality photos and dialogue of cutting-edge thoughts. it truly is in response to the most typical scientific circumstances encountered in day-by-day perform and makes use of an algorithmic method of support radiologists arrive first at a operating differential analysis after which succeed in a correct prognosis in line with imaging good points, which contain scientific, laboratory, and different underlying contexts.

The publication is prepared by way of anatomical organ of foundation and every bankruptcy presents a quick anatomical heritage of the organ lower than evaluation; explores a number of cross-sectional imaging strategies and customary pathologies; and offers functional algorithms in keeping with usually encountered imaging beneficial properties. specified emphasis is put on the position of computed tomography (CT) and magnetic resonance imaging (MRI). as well as algorithmic insurance of many pathological entities in a number of abdominopelvic organs, detailed subject matters also are tested, reminiscent of imaging of organ transplant (including kidney, liver and pancreas), assessment of perianal fistula, and review of rectal carcinoma and prostate carcinoma through MRI. Cross-Sectional Imaging of the stomach and Pelvis: a realistic Algorithmic method is a special and functional source for radiologists, fellows, and residents.

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Additional info for Cross-Sectional Imaging of the Abdomen and Pelvis: A Practical Algorithmic Approach

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27 Hepatocellular adenoma. Axial in-phase (a), and out-of-phase (b) demonstrating a well circumscribed mass (arrow), exhibiting homogeneous drop of signal on out-of-phase compared to in-phase secondary to the presence of intracellular lipid (microscopic fat), consistent with adenoma. Axial contrast enhanced T1-weighted images in arterial phase (c) and delayed phase (d) in a different patient demonstrating masses (arrows) exhibiting slight homogeneous enhancement in arterial phase and washout on delayed phase.

25 Peripheral washout sign. Axial contrast enhanced CT in arterial phase (a), and delayed phase (b) demonstrate hypoattenuating lesions (arrows in a), with a peripheral hypoattenuating rim in delayed phase (arrow in b), consistent with metastatic deposits secondary to colon adenocarcinoma Key Teaching Point The main differential diagnoses for arterially enhancing lesions include hepatocellular carcinoma, focal nodular hyperplasia, adenoma, flash-filling hemangioma, and metastases. In the presence of cirrhotic features, HCC is the most likely diagnosis particularly when supported by enhancement washout and pseudocapsule in delayed phase.

On MR cholangiography, bile duct hamartomas appear as multiple tiny cystic lesions that do not communicate with the biliary tree [10]. Although this appearance resembles simple cysts, biliary hamartomas may demonstrate a subtle thin rim of enhancement on postcontrast images (Fig. 6) due to enhancing fibrous capsule and/or compressed surrounding parenchyma. This rim of subtle enhancement should not be mistaken for other diagnoses such as abscesses and metastases. Capsule can also demonstrate low signal intensity on T2-weighted images.

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