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Journal of Ultrasound in Medicine, Vol 14, Issue 2 77-80, Copyright © 1995 by American Institute of Ultrasound in Medicine

JOURNAL ARTICLE

Focal sparing of liver parenchyma in steatosis: role of the gallbladder and its vessels

B. Aubin, A. Denys, M. Lafortune, R. Dery and G. Breton
Department of Radiologie, Hopital Saint-Luc, Montreal, Quebec, Canada.

The purpose of this study was to determine the prevalence and localization of focal areas of sparing in a population of patients with fatty infiltration (steatosis) of the liver. We also sought to determine if the blood supply of the gallbladder has an effect on fatty infiltration of the liver adjacent to it. We studied 290 patients with sonographic signs of fatty infiltration of the liver with gray scale sonography. In 58 of the patients, the gallbladder had been removed previously. A zone of focal sparing was found in 67% of patients with liver steatosis (78% in patients with an intact gallbladder versus 33% in patients with previous cholecystectomy). In patients with an intact gallbladder, segments 4 and 5 were spared most often. These segments were rarely spared in patients with previous cholecystectomy. Other sites of focal sparing were observed with the same frequency in the two groups. We conclude that focal sparing occurs frequently in patients with liver steatosis, especially in segments 4 and 5. When the gallbladder is absent, areas of focal sparing are less frequent, and they rarely involve segments 4 and 5. This suggests that the blood supply of the gallbladder plays a role in the distribution of the fat in the adjacent liver. Focal sparing might serve as an additional sign in the diagnosis of steatosis of the liver, especially in patients with an intact gallbladder.


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L.-P. Liu, B.-W. Dong, X.-L. Yu, D.-K. Zhang, X. Li, and H. Li
Analysis of Focal Spared Areas in Fatty Liver Using Color Doppler Imaging and Contrast-Enhanced Microvessel Display Sonography
J. Ultrasound Med., March 1, 2008; 27(3): 387 - 394.
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Copyright © 1995 by the American Institute of Ultrasound in Medicine.