"The pseudocalculus sign is a term coined to describe a mimic of a distally impacted common bile duct (CBD) stone on ERCP, MRCP and the various forms of cholangiography, including T-tube, CT, intraoperative, and percutaneous 1."
"The sign was first reported in 1968 by the renowned GI radiologist Thomas C Beneventano (1932-1988) who spent his entire career at the Albert Einstein College of Medicine in New York City 2,3."
"The pseudocalculus sign is a term coined to describe a mimic of a distally impacted common bile duct (CBD) stone on ERCP, MRCP and the various forms of cholangiography, including T-tube, CT, intraoperative, and percutaneous 1."
"the inferior margin of the pseudocalculus will never be seen as it is not a true filling defect; if an inferior margin is visualised then pseudocalculus has been excluded"