Abstract
Objective To study the use of MRCP digital quantitative diagnosis in the differential diagnosis of choledochal cyst type Ic. Methods The clinical data of 41 patients with choledochal cyst type Ic, 47 patients with distal choledochal obstruction and 43 patients with simple gallbladder stones or polyps who were treated at the Eastern Hepatobiliary Surgery Hospital, PLA Naval Medical University from January 2010 to June 2016 were retrospectively analyzed. The diameters of the common bile duct, the left and the right hepatic ducts were measured and compared. Results The maximum diameter of the left hepatic duct (LHD), right hepatic duct (RHD) and common bile duct (CBD) were significantly different (all P 0.05), while the ratios of CBD/LHD and CBD/RHD were significantly larger (P 0.05). The proportion of pancreaticobiliary maljunction (PBM) in patients with type Ic choledochal cyst was significantly higher than patients with distal choledochal obstruction and simple gallstone or polyp (P<0.05). Conclusions For patients with choledochal cyst type Ic, their CBD shows obvious dilation, while there is no obvious dilation in LHD and RHD. It is helpful to conduct differential diagnosis of choledochal cyst type Ic by the use of MRCP to observe the presence of PBM and to quantitatively compare the CBD/LHD and CBD/RHD ratios. Key words: Choledochal cyst; MRCP; Differential diagnosis; Digital quanlification
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