OBJECTIVE: We report the imaging features
of hepatic peribiliary cysts (PC) and the course of their development on
CT. MATERIALS AND METHODS: Both CT and US findings were correlated with
histopathologic findings in two patients with PC at autopsy. Five patients
with cysts around the portal vein on CT but without histologic correlation
were also included in this study. In six patients the course of PC development
was observed. RESULTS: In the two autopsy cases cystic dilatation of the
peribiliary glands was confirmed. The cases showed continuous small cysts
along the portal veins reflecting the periportal collar seen on CT and
the abnormal MR signal intensity of the periportal area. Ultrasound (US)
showed round or tubular anechoic lesions around the large portal tracts
mimicking dilatation of the bile ducts. Clustered cysts and echogenic dots
or bands around PC were also seen. In three of six cases the PCs gradually
enlarged and increased in number. CONCLUSION: In patients with liver cirrhosis
PCs can be demonstrated by CT, US, and MRI in the vicinity of the hepatic
hilum. Peribiliary cysts enlarge gradually and must be differentiated from
dilatation of bile ducts or edema of portal tracts.
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