By Alessandro Castriota-Scanderbeg, Bruno Dallapiccola
This e-book makes a speciality of the radiographic alterations of malformation syndromes and skeletal dysplasias. it truly is established such that the reader can determine the radiographic adjustments and relate them to express affliction entities. the purpose is to supply an important, useful guide to the popularity of the major radiographic indicators for diagnosing malformation syndromes and skeletal dysplasias. The booklet is meant for radiologists, scientific and clinical geneticists, and pediatricians. the cloth is split into components. the 1st half is based in a symptom-oriented shape and describes nearly two hundred radiographic symptoms, offering information regarding their occurrence, anatomic position, diagnostic relevance, pathogenesis, and trend of inheritance, if appropriate. the second one half offers approximately a hundred syndromes and skeletal dysplasias and offers analytical details referring to indicators, genetics, explanations, radiographic visual appeal, and significant differential analysis.
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A peak velocity of greater than 1 m/s or a threeto fourfold increase in velocity across the narrowed segment relative to velocity in the prestenotic segment is suggestive of clinically significant stenosis, at least in the setting of abnormal liver function . Portal vein thrombosis and significant portal vein stenosis can cause graft dysfunction and portal hypertension (Fig. 5). Interval enlargement of the spleen and ascites may be secondary signs of portal hypertension. The treatment options for portal vein complications include angioplasty, stent placement, portosystemic shunt, and surgical revision of the venous anastomosis.
C) Color and grayscale image demonstrates an enlarged caudate lobe (arrows) with its vein draining directly in the IVC (arrowhead). MR imaging and liver biopsy confirmed the diagnosis of Budd-Chiari syndrome. Ultrasound appearance of veno-occlusive disease In this entity the hepatic veins are usually normal, because the obstruction occurs at the level of the centrilobular hepatic venules. The usefulness of ultrasound in the evaluation of this complication is controversial. 8 caused by increased peripheral resistance in the liver parenchyma.
Hepatomegaly and ascites are common. Predominant hypertrophy of the caudate lobe is characteristic and occurs because of its separate venous drainage directly into the IVC. Color and spectral Doppler ultrasound may demonstrate absent, decreased, reversed, or turbulent flow with elevated velocities within the hepatic veins . When blood flow is present in the Role of Vascular Ultrasound Fig. 19. Aneurysm of the portal vein in a 22-year-old man who underwent a liver transplant 11 years earlier.
Abdominal, An Issue of Ultrasound Clinics by Alessandro Castriota-Scanderbeg, Bruno Dallapiccola