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IMAGING CHARACTERISTICS AND VALUES OF MAGNETIC REASONANCE IMAGING IN THE DIAGNOSIS OF HILAR CHOLANGIOCARCINOMA
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Abstract
Objectives: Describing imaging characteristics, assessing values of MRI in the diagnosis and staging of hilar cholangiocarcinoma. Patients and methods: 35 patients suspected of hilar cholangiocarcinoma who had undergone MRI in Viet Duc Hopital were selected to be in a descriptive study from July 2019 to July 2021. Results: Average size of mass-forming and intraductal growing type was 3,86±1,77cm. With periductal infiltrating type, average wall thickness was 6,53±4,04mm; average segment involvement was 25,47±6,87mm. On T1W imaging, majority of tumors were hypointense or isointense (93,8%), the signal intensity was variable on T2W imaging. 96,8% tumors showed restricted diffusion. MRI had sensitivity 100%, specificity 25%, positive predicted value 91,2 %, negative predicted value 100%, accuracy 91,4% in the diagnosis of hilar cholangiocarcinoma. Accuracy for ductal extent for MRI was 83,9%. Conclusion: Hilar cholangiocarcinoma is typically hypointense or isointense on T1W, restricted diffusion on DWI, the signal intensity is variable on T2W. MRI is a valuable method in diagnosis and staging hilar cholangiocarcinoma.
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Keywords
hilar cholangiocarcinoma, magnetic reasonance imaging, diagonis
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