Pseudocalculus sign (common bile duct)

Dr Dan J Bell and A.Prof Frank Gaillard et al.

A pseudocalculus sign is a term coined to describe a mimic of a distally impacted common bile duct (CBD) stone on MRCP and CT cholangiography. 

It results from the forceful contraction of the ampulla of Vater with pouting into the lower end of the CBD. This impression is superiorly rounded and may appear as the superior surface of a stone, leading to the misdiagnosis of choledocholithiasis.

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Article information

rID: 8061
Section: Signs
Tag: cbd
Synonyms or Alternate Spellings:
  • Pseudocalculus sign (biliary)

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