SUMMARYMirizzi's syndrome is the compression of the common bile duct or common hepatic duct by calculi still within the cystic duct or gallbladder neck. Anatomical factors are of prime aetiological significance in the former and the calculus size in the latter.Diagnosis is difficult clinically and at operation and oral or intravenous cholangiography is seldom helpful. Direct cholangiography with P.T.C., E.R.C.P. or operative cholangiography usually allows the diagnosis to be established if the existence of this pathological entity is appreciated and born in mind.This paper demonstrates six examples seen within the past two years and it would appear, therefore, not to be uncommon and a diagnosis that radiologists should be aware off and able to establish with cholangiographic techniques and in some cases, possibly, with diagnostic ultrasound.