Fig. 1

a On T2-weighted images, saccular dilatation is observed in the middle part of the cystic duct (type VI biliary cyst) (white arrowhead). The gallbladder (white arrow) and the proximal (red arrow) and distal cystic duct (red arrowhead) are normal. b On axial and c coronal MRCP images, similar to T2-weighted images, saccular dilatation is observed in the middle part of the cystic duct (white arrowhead). It is seen that the gallbladder (white arrow) and distal cystic duct (red arrowhead) are normal and distal cystic duct relationship with cystic dilatation is more clear