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  • Title: Intrahepatic cystic lesions after hepatic portoenterostomy for biliary atresia with bile lake and dilated bile ducts.
    Author: Tainaka T, Kaneko K, Seo T, Ono Y, Sumida W, Ando H.
    Journal: J Pediatr Gastroenterol Nutr; 2007 Jan; 44(1):104-7. PubMed ID: 17204962.
    Abstract:
    BACKGROUND: Intrahepatic cystic lesions develop after hepatic portoenterostomy in some patients with biliary atresia and have been regarded as an indication of poor prognosis; however, there is confusion about the terminology and concepts of the lesions. We investigated whether the cystic lesions constituted a single entity. PATIENTS AND METHODS: From 1980 to 2005, we encountered 80 patients with biliary atresia. Abdominal ultrasonography disclosed intrahepatic cystic lesions in 20 (25%) patients after hepatic portoenterostomy. The cystic lesions were analyzed morphologically with radiologic imaging studies and histologically in 13 patients who underwent liver transplantation. RESULTS: Fifteen patients had solitary simple cystic lesions, and 5 patients had multiple continuous oval or beaded lesions. Solitary lesions had a fibrotic cyst wall and lacked epithelia. Continuous lesions had a cyst wall covered with biliary epithelia. Thirteen patients with solitary cysts died or required liver transplantation. In 2 patients with continuous lesions, surgical reboring of the porta hepatis could eliminate cystic lesions and jaundice. CONCLUSIONS: Intrahepatic cystic lesions include 2 different conditions. Solitary cysts are retention pseudocysts, which should be referred to as a bile lake, and are associated with poor prognosis. Continuous beaded cysts are dilated bile ducts, which may be reversed. This distinction is important when considering the treatment strategy.
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