Download e-book for kindle: Gastrointestinal Imaging by Angela D. Levy, Koenraad J. Mortele, Benjamin M. Yeh

By Angela D. Levy, Koenraad J. Mortele, Benjamin M. Yeh

ISBN-10: 0199759421

ISBN-13: 9780199759422

Gastrointestinal Imaging offers a finished evaluation of gastrointestinal pathologies usually encountered by way of training radiologists and citizens in education. Chapters are equipped by means of organ method and comprise the Pharynx and Esophagus, abdominal, Small Bowel, Appendix, Colon, Anorectum, Liver, Gallbladder, Bile Ducts, Pancreas, Spleen, Peritoneum, Mesentery, and stomach Wall, and a bankruptcy on multisystem issues. a part of the Rotations in Radiology sequence, this publication bargains a guided method of imaging prognosis with examples of all imaging modalities complimented by way of the fundamentals of interpretation and strategy and the nuances essential to arrive on the top analysis. every one pathology is roofed with a precise dialogue that reports the definition, scientific gains, anatomy and body structure, imaging strategies, differential prognosis, medical matters, key issues, and extra examining. This association is perfect for trainees' use in the course of particular rotations and for examination evaluation, or as a brief refresher for the demonstrated gastrointestinal imager.

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B. Viral Esophagitis Figure 5-2 Candida esophagitis with a shaggy esophagus. There are innumerable plaques and pseudomembranes in the esophagus, producing a grossly irregular or shaggy contour due to the trapping of barium between these lesions. This patient had AIDS. Definition The herpes simplex virus type 1 is a frequent cause of infectious esophagitis, occurring mainly in immunosuppressed patients. Cytomegalovirus (CMV) and human immunodeficiency virus (HIV) also cause infectious esophagitis in patients with AIDS.

Other patients may develop secondary achalasia because of tumor involving the vagus nerve, dorsal motor nucleus of the vagus nerve, or brain stem. Still other patients have tumors that secrete a vasoactive substance, producing a paraneoplastic syndrome that mimics achalasia. Imaging Features Primary achalasia is characterized on barium studies by a dilated, flaccid esophagus with absent primary peristalsis and tapered, beaklike narrowing of the distal esophagus at or directly adjacent to the gastroesophageal junction due to incomplete opening of the LES (Figure 3-1).

Many patients with secondary achalasia have tumor that directly infiltrates the gastroesophageal junction, destroying the ganglion cells in this region. In North America, as many as 75% of patients with secondary achalasia are found to have a carcinoma of the cardia or fundus as the cause of this condition. Carcinoma of the lung, breast, and pancreas and other malignant tumors can also metastasize to the gastroesophageal junction, causing secondary achalasia. Other patients may develop secondary achalasia because of tumor involving the vagus nerve, dorsal motor nucleus of the vagus nerve, or brain stem.

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Gastrointestinal Imaging by Angela D. Levy, Koenraad J. Mortele, Benjamin M. Yeh

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