Fig. 2
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40792-019-0751-1/MediaObjects/40792_2019_751_Fig2_HTML.png)
Endoscopic retrograde cholangiopancreatography showed narrowing of the distal bile duct and dilation of the peripheral bile duct, and abrasion cytology was performed
Endoscopic retrograde cholangiopancreatography showed narrowing of the distal bile duct and dilation of the peripheral bile duct, and abrasion cytology was performed