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Fig. 5. —83-year-old woman with bile duct stone, clinical indications of cholangitis, and false-positive MR cholangiopancreatography result. Heavily T2-weighted single-shot fast spin-echo MR cholangiopancreatography sequence (coronal oblique slice 5 mm thick; TE_eff = 1,300 msec) shows dilatation of common bile duct (star) and 4-mm lacuna, typical of stone in lower third of common bile duct (arrow). Endoscopic sonography and ERCP, performed 48 hr later, found bile duct dilatation but no bile duct stone, but ERCP only showed papillary edema, which could suggest stone migration.