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Good Positive and Negative Likelihood Ratios

Extrahepatic Biliary Obstruction: Likelihood Ratios

Introduction: Extrahepatic biliary obstruction reflects inability of bile to leave the liver and/or gallbladder with the obstruction occurring outside the liver. One common cause is Cholelithiasis leading to Choledocholithiasis, but tumors can also obstruct the common bile duct.

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Tags: Gastrointestinal Problem Tag this Diagnosis.

Differential Diagnoses include: Choledocholithiasis

The likelihood ratios of findings for Extrahepatic Biliary Obstruction are listed below. See the left navigation bar to change the display.

Pre-Test Probability (Prevalence): %. Post-Test Probability (Predictive Value): %. Switch to display mode.
**Note that calculating probabilities from more than one finding is inherently inaccurate because findings are not independent. (For example, using two positive findings that share a common pathogenesis is likely to overestimate the true probability.)
Good Positive and Negative Likelihood Ratios
FindingResult +LR-LR
[ + ] MRCP + 0 - 31.70.1