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Peribiliary cysts in cirrhotic liver: observation on computed tomography
K Hoshiba1, O Matsui, M Kadoya
1Department of Radiology, Kanazawa University School of Medicine, 13-1, Takara-machi, Kanazawa 920, Japan.
Background:
To analyze the frequency and number of suspected peribiliary cysts in cirrhotic liver on computed tomography (CT).
Methods:
Three hundred forty-six cases with clinically diagnosed liver cirrhosis (LC) and 307 cases with clinically diagnosed non-LC were subjected to the study. The frequency and number of suspected peribiliary cysts on CT were compared between the two groups. The existence of peribiliary cysts was suggested when a cyst was observed around the second- to fourth-order branches of the intrahepatic portal vein.
Results:
Peribiliary cysts were suggested on CT in 31 of 346 cirrhotic livers (9.0%) and 10 of 307 noncirrhotic livers (3.3%). This difference in the frequency of peribiliary cysts was statistically significant (chi2, p < 0.01). Multiple peribiliary cysts were seen in 71% of cirrhotic patients with peribiliary cyst. The size of peribiliary cysts was smaller than 1.5 cm in diameter.
Conclusion:
Peribiliary cyst is radiologically observed more frequently in cirrhotic liver than in noncirrhotic liver and is occasionally multiple.