November 13, 2007

Allison Zwingenberger, in Ultrasound Tuesday

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Biliary obstruction

Extrahepatic biliary obstruction is a reasonably common clinical scenario in older cats. Chronic cholangiohepatitis, pancreatitis and neoplasia can all cause bile duct obstruction with jaundice and high serum bilirubin. The bile duct can undergo a chronic partial obstruction from a mass or inflammatory tissue, or an acute obstruction from a calculus. In complete biliary obstruction, [...]

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November 06, 2007

Allison Zwingenberger, in Ultrasound Tuesday

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Gall bladder wall edema

Edema of the gall bladder wall looks like a hypoechoic layer between two hyperechcoic surfaces. It can be confused with a small amount of peritoneal effusion so look carefully at the neck and body. In the images here, you can see the anechoic peritoneal effusion surrounding the thickened gall bladder wall. Although gall bladder wall [...]

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October 30, 2007

Allison Zwingenberger, in Ultrasound Tuesday

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Acute renal infarcts

Renal infarcts are often incidental findings in animals with chronic renal disease. Infarcts are caused by thrombi that occlude a blood vessel in the kidney. Most of the time, they are chronic and mainly made up of fibrous tissue. The classic appearance is of a hyperechoic, wedge shaped area with the wide part of the [...]

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