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Fig. 3D. —Type 2 aberrant bile duct in 64-year-old woman with gallbladder polyp. Axial source images from helical CT cholangiogram, of which each has intersection gap of 3 mm, clearly delineate both cystic duct (small arrow, D and E) and aberrant bile duct (arrowhead, B-D). Cystic duct runs anterior to and communicates with common hepatic duct (large arrow, D and E), and gallbladder polyp (arrow, C) is shown in gallbladder neck.