Choledocholithiasis: Likelihood Ratios

Introduction: Stones in the common bile duct, causing obstruction of bile flow out of the liver. Consequences of this include - besides simply Extrahepatic Biliary Obstruction - Acute Pancreatitis and acute cholangitis.

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Tags: Hepatic Tag this Diagnosis.

Differential Diagnoses include: Extrahepatic Biliary Obstruction

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

Good Positive and Negative Likelihood Ratios

Finding	+LR	-LR	Comments, Study
Endoscopic Ultrasound	19.2	0	Differential Diagnosis: Extrahepatic Biliary Obstruction Study: Abdom Imaging. 2008 Jan-Feb;33(1):6-9. PMID: 17874159
MRCP Duplicate	17.4	0.1	MRCP done with slices <= 3 mm or 3D MRCP Differential Diagnosis: Extrahepatic Biliary Obstruction Study: Abdom Imaging. 2008 Jan-Feb;33(1):6-9. PMID: 17874159
Bile Duct Dilatation	8.1	0.1	internal bile duct diameter on ultrasonography of less than or equal to 5 mm up to age 50 years, increasing by 1 mm per decade, was considered normal Study: Br J Surg. 1995 Oct;82(10):1371-3 PMID: 7489169
Bile Duct Dilatation or Any Elevated LFT	4.4	0.1	bile duct >5mm (+1 / decade over 50); LFTs: bilirubin, ALT, or AP Study: Br J Surg. 1995 Oct;82(10):1371-3 PMID: 7489169

Good Positive Likelihood Ratio

Finding	+LR	-LR	Comments, Study
Elevated LFTs	23	0.6	at least 2 of: bilirubin, AP, ALT Study: Br J Surg. 1995 Oct;82(10):1371-3 PMID: 7489169
MRCP Duplicate	2	0.8	MRCP with >= 5mm slices Differential Diagnosis: Extrahepatic Biliary Obstruction Study: Abdom Imaging. 2008 Jan-Feb;33(1):6-9. PMID: 17874159