CHOLEDOCHOLITHIASIS

✓ Medically ReviewedDISEASEID: MDBT0113🚨 TRIAGE: URGENTICD-10: K80.5

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Definition

CLINICAL DEFINITION

Choledocholithiasis is stones in the common bile duct (main tube carrying bile from liver to gut). Stones are usually cholesterol or pigment concretions (solid masses). Most migrate from the gallbladder (bile storage sac). Some form in the duct with stasis (slow bile flow) or infection. Obstruction can cause jaundice (yellow skin from bile buildup), cholangitis (bile duct infection) or pancreatitis (pancreas inflammation).

IN PLAIN ENGLISH

Bile flows through a main tube. Stones can block this tube. Blocked bile turns skin yellow. It can cause pain and fever. Doctors clear the tube with a scope.

COMMON MISCONCEPTION / WHAT IT DOES NOT MEAN

Choledocholithiasis is not gallbladder stones alone (cholelithiasis, stones in the storage sac). It is not sludge (thick bile without solid stones) alone. It is not tumour (cancer growth) blocking the duct without stones. It is not benign stricture (scar narrowing) without stones. Diagnosis needs a proven stone in the duct.

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Word Breakdown

choledocho-

=bile duct, tube carrying bile from liver to gut

lith

=stone

-iasis

=abnormal condition or disease process

Literal Meaning: condition of bile duct stones

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Abbreviations

CBDS=Common bile duct stones - stones in the main bile tube

CBD=Common bile duct - main tube carrying bile to the gut

ERCP=Endoscopic retrograde cholangiopancreatography - camera procedure to clear the duct

MRCP=Magnetic resonance cholangiopancreatography - MRI scan of bile ducts

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Synonyms & Variants

Common bile duct stones›Bile duct calculi›CBD stones›

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Category-Specific Context

Choledocholithiasis is a Disease because it is an acquired obstructive disorder (blockage illness) with course and rescue. It is not a Symptom (felt complaint) such as colic alone. It is not a Sign (exam finding) such as jaundice alone. It spans silent and obstructive phases (quiet and blocked levels). Care aims to restore drainage (bile flow) with recurrence prevention.

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Clinical Context & Usage

CLINICAL SETTINGS

Emergency DepartmentGastroenterology ClinicHepatobiliary Surgery UnitPrimary Care with Jaundice ReferralIntensive Care Unit for Biliary Sepsis

USAGE & DOCUMENTATION NOTES

Use choledocholithiasis only when imaging or ERCP (camera duct clearance) proves duct stones. Do not use for gallbladder stones alone. Specify primary (formed in duct) versus secondary (migrated from gallbladder) when known. Note cholangitis (duct infection) or pancreatitis (pancreas inflammation) if present. Record stone size, number and dilation (widening).

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Primary Causes & Pathophysiology

PATHOPHYSIOLOGY

Gallbladder stones migrate through the cystic duct (gallbladder neck tube) into the common duct. The lodged stone blocks bile flow. Pressure rises upstream and bacteria (germs) multiply. Blocked pancreatic outflow (pancreas drainage) can trigger pancreatitis (pancreas inflammation). Chronic stasis (slow flow) with bacterial change favours brown pigment stones (infection-related stones).

PRIMARY CAUSES

Secondary migration of gallbladder cholesterol stones

Small gallbladder stones pass through the cystic duct and lodge in the common duct blocking flow

Primary brown pigment stones from stasis and infection

Bacteria deconjugate bilirubin (bile pigment) forming calcium bilirubinate that precipitates into stones

Biliary stricture with stasis

Narrowing slows bile and allows crystal nucleation (initial clumping) with stone growth

Recurrent pyogenic cholangitis with debris

Chronic bacterial infection with tissue debris creates a nidus (focus) for stone formation

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Drug-Induced Causes

💊 Ceftriaxone ↗

Mechanism: Calcium salt precipitates in bile causing pseudolithiasis (reversible sludge mimicking stones)

→ Stop drug when possible, hydrate, use alternative antibiotic and manage stones by standard care

💊 Estrogens and combined oral contraceptives ↗

Mechanism: Raise biliary cholesterol saturation (excess cholesterol in bile) promoting cholesterol stones

→ Review hormone need, consider non-estrogen options and treat stones by standard care

💊 Fibrates ↗

Mechanism: Raise cholesterol excretion into bile favouring stone formation

→ Stop fibrate if feasible and clear duct stones by standard care

💊 Octreotide ↗

Mechanism: Impairs gallbladder emptying causing sludge (thick bile) with stone growth

→ Monitor gallbladder, stop drug if possible and manage stones by standard care

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Epidemiology

Prevalence:Choledocholithiasis is common in adults with gallstone disease. Risk rises with longer gallstone history and older age. It is seen worldwide where gallstones are common. It is uncommon in children except with haemolysis (red cell breakdown) or biliary anomalies (birth duct differences).

Age Group:It mainly affects middle-aged and older adults. Risk rises with advancing age and stone duration. It is uncommon in children without predisposing blood or duct disease.

Geographic Distribution:Choledocholithiasis occurs worldwide mirroring gallstone frequency. Cholesterol stones dominate where diet-related stone burden is high. Brown pigment duct stones cluster in parts of Asia with recurrent biliary infection. Detection tracks ultrasound, MRCP and ERCP access.

Red Flags & Triage ★

TRIAGE LEVEL

🚨 URGENT

DO NOT MISS — LIFE-THREATENING PRESENTATIONS

Acute cholangitis with sepsis
Acute biliary pancreatitis
Malignant biliary obstruction mimicking stones
Retained stones after gallbladder removal with recurrent sepsis

URGENT EVALUATION TRIGGERS

Fever with jaundice and right upper pain suggesting Charcot triad (fever, pain, jaundice trio)
Low pressure or confusion with jaundice suggesting severe infection
Severe upper belly pain with vomiting suggesting pancreatitis
Shaking chills or worsening jaundice with dark urine
Rising bilirubin (bile pigment) with dilated duct on imaging

Contraindications & Precautions

CONTRAINDICATIONS

Do not delay drainage (bile relief) in cholangitis or sepsis while awaiting full workup
Do not use watchful waiting alone for obstructing stones with fever
Do not attempt stone breakup alone without a drainage plan
Do not ignore blood thinner or bleeding risk before invasive clearance

SPECIAL PRECAUTIONS

Assess bleeding risk with blood thinners before camera duct clearance
Correct clotting problems and hold interacting drugs per protocol
Use preventive antibiotics (germ drugs) when infection is suspected
Watch pancreas enzymes (pancreas injury labs) after duct procedure
Plan gallbladder removal to prevent return

Complications

DOWNSTREAM CLINICAL COMPLICATIONS

Acute cholangitis with bile duct infection
Acute gallstone pancreatitis with pancreas inflammation
Obstructive jaundice with pruritus (yellow skin with itching)
Biliary stricture with scar narrowing
Secondary biliary cirrhosis with prolonged obstruction
Biliary sepsis with septic shock

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Confused With (LASA & DDx) ★

LEXICAL (LASA) — SIMILAR NAMES

Cholelithiasis

Sounds similar and often coexists but means gallbladder stones, not duct stones

Choledochal cyst

Shares choledocho prefix but means congenital duct dilation (birth widening), not stones

Cholestasis

Shares root with jaundice overlap but means slowed bile flow from many causes, not specifically stones

Cholangitis

Often complicates duct stones but means bile duct infection, not the stones themselves

CLINICAL DIFFERENTIAL DIAGNOSES (DDx)

Cholangiocarcinoma

Key Distinguishing Feature: Malignant stricture (cancer narrowing) without mobile stones with progressive painless jaundice

Pancreatic head adenocarcinoma

Key Distinguishing Feature: Double duct dilation (bile and pancreas ducts widened) with pancreatic mass, not duct stones

Acute cholecystitis

Key Distinguishing Feature: Gallbladder wall thickening with Murphy sign (pain on pressed gallbladder) and usually normal duct

Benign biliary stricture

Key Distinguishing Feature: Fixed narrowing without mobile filling defects (stone gaps), often after surgery

Sphincter of Oddi dysfunction

Key Distinguishing Feature: Biliary pain with abnormal valve movement but no stones on MRCP (bile duct MRI)

Mirizzi syndrome

Key Distinguishing Feature: Gallbladder stone compressing the common duct from outside, not a stone inside the duct

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Clinical Pearls

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Suspect duct stones when gallstone pain pairs with jaundice or abnormal liver tests even if pain has eased. Arrange MRCP (bile duct MRI) promptly.

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Treat Charcot triad of fever, right upper pain and jaundice as cholangitis (duct infection) needing urgent antibiotics with drainage. Do not delay referral.

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Use MRCP to confirm stones noninvasively and ERCP (camera clearance) to diagnose and treat in one session. Check pancreas enzymes after ERCP.

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Plan gallbladder removal after duct clearance for secondary stones. Surgery cuts recurrence (return) with pancreatitis (pancreas inflammation) risk.

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Review ceftriaxone, estrogens, fibrates and octreotide at diagnosis. Stop or switch the driver where feasible with standard stone care.

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Example Usage & SOAP

CLINICAL SENTENCE

""MRCP shows choledocholithiasis with distal stone and upstream duct dilation.""

IN A SOAP NOTE

S: 58-year-old man with 2 days right upper pain, nausea, dark urine and itching with fever. O: Temp 38.4C, HR 108, BP 102/64, RR 20, SpO2 96 percent on air, tender right upper quadrant, Murphy negative, yellow eyes. Labs show raised bilirubin with abnormal liver tests. A: Choledocholithiasis with suspected cholangitis (duct infection). P: Fluids, broad-spectrum antibiotics, urgent gastroenterology for camera duct clearance, vitals with liver test monitoring.

DIFFERENTIAL DIAGNOSIS CONTEXT

Jaundice with biliary pain favours choledocholithiasis when stones or dilation (widening) are seen. Painless progressive obstruction with mass favours tumour (cancer growth). Localised pain with thickened gallbladder and normal duct favours cholecystitis (sac infection). Use MRCP (bile duct MRI) to separate stones from strictures (narrowings).

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Classifications & Scoring

GRADING SYSTEM

Tokyo Guidelines severity grading for acute cholangitis

Grades cholangitis as mild, moderate or severe using organ failure, inflammation and imaging to guide drainage urgency

SCORING TOOL

ASGE risk stratification for suspected choledocholithiasis

Stratifies high, intermediate or low probability using bilirubin, duct dilation and cholangitis or seen stone to guide MRCP versus direct ERCP

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Prognosis

SHORT-TERM OUTCOME

Short term outlook is good with prompt duct clearance (stone removal). Without treatment, pain with jaundice (yellow skin) persists. Cholangitis (duct infection) or pancreatitis can worsen fast. Early camera clearance or surgery prevents sepsis (severe infection). Delay raises intensive care risk.

LONG-TERM PROGNOSIS

Long term outlook is excellent after complete clearance with gallbladder removal when indicated. Recurrence (return) occurs mainly with retained fragments or stasis (slow flow). Prolonged obstruction without relief can scar the liver. Blood or stricture disease raises recurrence risk.

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References & Coding

ICD-10 DIAGNOSTIC CODE

K80.5

LITERATURE CITATIONS & GUIDELINES

[1]WHO ICD-10 K80.5 Calculus of bile duct

[2]EASL gallstone disease guidance

[3]American Society for Gastrointestinal Endoscopy biliary stone guidance

[4]Harrison's Principles of Internal Medicine biliary disease

MEDICAL DISCLAIMER — This content is intended for educational purposes and qualified healthcare professionals only. Always refer to current clinical diagnostic criteria, institutional protocols, and official guidelines. Medobo is not responsible for clinical decisions made based on this content.