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    Magnetic resonance cholangiopancreatography evaluation of intrahepatic bile duct variations with updated classification
    (2016) Nayman, Alaaddin; Özbek, Orhan; Erol, Seyit; Karakuş, Hayrettin; Kaya, Hasan Emin
    PURPOSE Preoperative detection of intrahepatic bile duct (IHBD) variations is essential to reduce surgical mor-bidity and mortality rates. Magnetic resonance cholangiopancreatography (MRCP) is a noninvasive and reliable method for demonstrating the normal IHBD anatomy and its variations. This retrospec-tive study aimed to identify and classify novel variations, except those already reported in the liter-ature, using MRCP.METHODSMRCP examinations, which were conducted in two different centers in the last five years, were ret-rospectively evaluated. IHBD variations were recorded with respect to the Yoshida classification. In addition, newly detected variations that were not included in this classification were identified and classified.RESULTSMRCP examinations of 2624 patients were screened, and 2143 were determined to be eligible for evaluation. Of 2143 patients, 987 were males (average age, 54±18 years) and 1156 were females (mean age, 57±17 years). In this study, 10 novel variations that were not included in the Yoshida classification were identified in 14 patients.CONCLUSIONMRCP is an effective, reliable, and noninvasive imaging method for evaluating the IHBD anatomy and its variations. Novel variations described in this study may help to better understand the biliary anatom