title: The misdiagnosis of common bile duct stones with ultrasound.
abstract: Ultrasound is now widely used to demonstrate the presence of gall-stones in the gall bladder and common bile duct in jaundiced patients. The ultrasound appearance of gall-stones is characteristic and consists of strong, bright reflections with shadowing distally, though stones smaller than 3 or 4 mm may not always show shadowing. We report our experience with large common bile duct stones which do not show the characteristic features of gall-stones and so may be misdiagnosed as tumour masses. The possible reasons for these appearances are discussed.
mesh_terms: D002759:Adenoma, Bile Duct / Q000175:diagnosis; D000368:Aged; D003138:Common Bile Duct Neoplasms / Q000175:diagnosis; D003937:Diagnosis, Differential; D042882:Gallstones / Q000175:diagnosis*; D006801:Humans; D008297:Male; D010190:Pancreatic Neoplasms / Q000175:diagnosis; D014463:Ultrasonography