New PDF release: Gastrointestinal imaging ( DX- Direct )

By Hans-Juergen Brambs

Dx-Direct is a chain of twelve Thieme books masking the most subspecialties in radiology. It comprises all of the situations you're probably to determine on your standard operating day as a radiologist. for every or disorder you'll find the data you wish -- with simply the suitable point of aspect. Dx-Direct will get to the purpose: - Definitions, Epidemiology, Etiology, and Imaging symptoms - ordinary Presentation, remedies, direction and diagnosis - Differential analysis, information and Pitfalls, and Key References ...all mixed with fine quality diagnostic pictures. no matter if you're a resident or a trainee, getting ready for board examinations or simply searching for a wonderfully geared up reference: Dx-Direct is the high-yield selection for you! The sequence covers the complete spectrum of radiology subspecialties together with: - mind - Gastrointestinal - Cardiac - Breast - Urogenital - Spinal - Head and Neck - Musculoskeletal - Pediatric - Thoracic - Vascular - Interventional Radiology

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Often there is a large intrahepatic tumor (5-15 em in diameter) • Segmental dilation of the intrahepatic bile ducts. Occasionally spreads along the bile ducts. Retraction of the liver capsule is occasionally observed (a characteristic sign) • Calcifications occur in up to 20% of cases. Tumor enhancement occurs late and persists for a long time. • CTfindings Hypodense on unenhanced scans. Nodular to coarse calcifications are well visualized • Arterial phase demonstrates a hypervascular halo. Enhancement is heterogeneous in the late phase, and tumor margins are often more clearly demarcated.

31 ,... ~. , FIg. 210, b Hepatic adenoma with hemorrhage. a T2-weighted MRimage. Inhomogeneous pattern after hemorrhage in a hepatic adenoma. At the margin of the hemorrhage,a solid tumor nodule can be differentiated (arrow). b After contrast administration. the adenoma (arrow) is slightly better differentiated from the surrounding liver tissue. Adjacent to the lesion is a large signal void representing the hemorrhage. ~ Therapeutic options Surgical removal. Small adenomas (less than 4 em) may be treated by percutaneous radiofrequency ablation.

Calcifications are readily detectable. is hyperechoic. • Angiography and nuclear medicine No longer used. Scar Clinical Aspects ............................................................................................ • Typical presentation Large tumors can produce a sensation of pressure and pain in the upper abdomen. Hepatomegaly with a palpable mass. Weight loss. Jaundice is rare, oc- 39 Fibrolamellar •... 24a,b Fibrolamellar HCC. a CT. Inhomogene- ous tumor of the left hepatic lobe that enhances slightly more than the normal right lobe.

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