CBD stones cause obstructive jaundice; superimposed infection produces ascending cholangitis.
Also known as: choledocholithiasis, CBD stones, ascending cholangitis, Charcot triad, Reynolds pentad
Overview
Choledocholithiasis: gallstones in the common bile duct (CBD). Ascending cholangitis: bacterial infection of the biliary tree, typically resulting from biliary obstruction (stone, stricture, malignancy) and ascending bacterial colonization, presenting with Charcot triad (fever, jaundice, RUQ pain) or Reynolds pentad (Charcot + hypotension + altered mental status).
Epidemiology
Choledocholithiasis present in 10-20% of patients with gallstones. Cholangitis affects 1-9% of patients with CBD stones; mortality 5-10% with prompt treatment, up to 50% if untreated or with severe sepsis.
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Question 1GastrointestinalMedium
A 45-year-old woman with obesity and type 2 diabetes mellitus presents to the emergency department with right upper quadrant pain, jaundice, and clay-colored stools. She is afebrile with stable vital signs, and examination shows scleral icterus and right upper quadrant tenderness without rebound. Laboratory studies show a total bilirubin of 4.6 mg/dL and an alkaline phosphatase of 410 U/L. Magnetic resonance cholangiopancreatography shows a stone in the common bile duct with proximal ductal dilation. Which of the following is the most appropriate management?
AERCP with sphincterotomy
BOpen bile duct exploration
CLaparoscopic cholecystectomy
DPercutaneous biliary drainage
Reveal answer & full explanation
Correct answer: A — ERCP with sphincterotomy
AERCP with sphincterotomy✓
BOpen bile duct exploration
CLaparoscopic cholecystectomy
DPercutaneous biliary drainage
Why ERCP with sphincterotomy is correct
Right upper quadrant pain, jaundice, clay-colored stools, and a cholestatic laboratory pattern (total bilirubin 4.6 mg/dL, alkaline phosphatase 410 U/L) indicate biliary obstruction
MRCP confirming a common bile duct stone with proximal ductal dilation establishes choledocholithiasis
Endoscopic retrograde cholangiopancreatography with sphincterotomy and stone extraction is the first-line, least invasive way to clear the duct and relieve the obstruction, per current ASGE guidance
Laparoscopic cholecystectomy should follow, ideally during the same admission, to remove the source gallbladder and prevent recurrence
Why the others are wrong
Open bile duct exploration — clears the duct but is far more invasive and is reserved for ERCP failure or surgically altered anatomy, not the first step (right-diagnosis-wrong-step)
Laparoscopic cholecystectomy — removes the gallbladder but does not extract the stone already lodged in the common bile duct, so the current obstruction persists; it follows duct clearance rather than replacing it (right-diagnosis-wrong-step)
Percutaneous biliary drainage — transhepatic access decompresses the biliary tree only when ERCP fails or the papilla cannot be reached; in a stable, afebrile patient with normal anatomy it is the unnecessarily invasive second-line option and leaves the stone in place (right-goal-wrong-route)
Question 2GastrointestinalEasy
A 38-year-old woman presents with 1 day of right upper quadrant pain, fever to 38.8°C, and jaundice. She underwent laparoscopic cholecystectomy 5 years ago. On examination she is ill-appearing with scleral icterus and right upper quadrant tenderness. Laboratory studies show a white blood cell count of 18,000/mm³, total bilirubin 8.5 mg/dL (direct 6.8 mg/dL), and alkaline phosphatase 12 times the upper limit of normal. Right upper quadrant ultrasound shows a dilated common bile duct measuring 14 mm without gallstones. Which of the following is the most likely diagnosis?
APrimary biliary cholangitis
BPyogenic hepatic abscess
CAscending cholangitis
DAcute hepatitis A
Reveal answer & full explanation
Correct answer: C — Ascending cholangitis
APrimary biliary cholangitis
BPyogenic hepatic abscess
CAscending cholangitis✓
DAcute hepatitis A
Why Ascending cholangitis is correct
Fever, jaundice, and right upper quadrant pain together form Charcot's triad, the classic presentation of acute cholangitis from an obstructed, infected biliary tree.
The cholestatic pattern (alkaline phosphatase 12 times the upper limit of normal with predominantly direct hyperbilirubinemia) plus a dilated 14-mm common bile duct localizes the block to the duct, and a white blood cell count of 18,000/mm³ signals bacterial infection.
After cholecystectomy, a retained or recurrent common bile duct stone or a postoperative stricture is the most common cause of this picture.
Management is urgent broad-spectrum IV antibiotics plus biliary decompression by ERCP.
Why the others are wrong
Primary biliary cholangitis — a buzzword match on "cholangitis" in a middle-aged woman, but PBC is a chronic, indolent, antimitochondrial-antibody-positive cholestatic disease without acute fever, leukocytosis, or ductal dilation.
Pyogenic hepatic abscess — premature closure on fever plus right upper quadrant pain, but an abscess shows a focal hepatic fluid collection on ultrasound rather than a dilated common bile duct and rarely causes this degree of obstructive jaundice.
Acute hepatitis A — anchoring on jaundice, but viral hepatitis produces a hepatocellular pattern with markedly elevated aminotransferases, not a 12-fold cholestatic alkaline phosphatase elevation with a dilated duct.
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Altered mental status — sepsis-induced encephalopathy
Excoriations from pruritus
Hepatomegaly possible
Classic findings
Charcot triad (fever + RUQ pain + jaundice) in any patient with gallstones — assume cholangitis until proven otherwise; this is a surgical/endoscopic emergency.
Differential diagnosis
Acute cholecystitis without CBD involvement — Murphy sign, gallbladder wall thickening on US, normal CBD diameter, mildly elevated LFTs only
Hepatitis (viral, alcoholic, drug-induced) — Markedly elevated AST/ALT, viral serologies; alk phos and bili less elevated proportionally
Pancreatic head malignancy — Painless jaundice, Courvoisier sign (palpable nontender gallbladder), weight loss; mass on imaging
Cholangiocarcinoma — Painless jaundice, irregular biliary stricture on MRCP/EUS
Mirizzi syndrome — Cystic duct stone compressing CBD; MRCP/EUS
Acute pancreatitis — Pain to back, lipase >3× ULN — may coexist with biliary obstruction
Diagnostic workup
Diagnostic criteria
ASGE risk stratification for CBD stones (2019): High probability (any 1 of: CBD stone on imaging; total bilirubin >4 mg/dL WITH a dilated CBD; or clinical ascending cholangitis) → proceed to ERCP. Intermediate (CBD dilation + elevated LFTs + bilirubin 1.8-4) → MRCP or EUS. Low → cholecystectomy alone. Tokyo Guidelines TG18 for cholangitis: A) systemic inflammation (fever, leukocytosis, CRP); B) cholestasis (jaundice, abnormal LFTs); C) imaging (biliary dilation, evidence of cause). Diagnosis requires 1 from each category.
Labs
CBC — leukocytosis with left shift
BMP — assess for AKI in sepsis
LFTs — elevated direct bilirubin, alk phos, GGT (cholestatic pattern); AST/ALT also elevated
Lipase — exclude or identify concurrent pancreatitis
Coagulation studies — INR may rise (vitamin K malabsorption in prolonged cholestasis)
Blood cultures × 2 — guide antibiotic therapy
Lactate, procalcitonin if septic
Imaging
RUQ ultrasound — first-line; identifies gallstones, dilated CBD (>6 mm in patients <60, >8 mm post-cholecystectomy), but sensitivity for CBD stones only 20-50%
MRCP — non-invasive, high sensitivity (>90%) for CBD stones
EUS — most sensitive for small CBD stones; preferred when MRCP equivocal
ERCP — diagnostic AND therapeutic; reserved for high-probability or therapeutic intent (do not use diagnostically due to pancreatitis risk)
CT — alternative when malignancy suspected; less sensitive for non-calcified stones
Diagnostic algorithm
flowchart TD
A[Suspected biliary disease<br/>RUQ pain + jaundice] --> B[Labs + RUQ US]
B --> C{Charcot triad?<br/>Fever + RUQ pain<br/>+ jaundice}
C -->|Yes — cholangitis| D[IV fluids + broad-spectrum<br/>antibiotics<br/>URGENT ERCP within 24h]
C -->|No| E{CBD stone probability<br/>ASGE 2019}
E -->|High: CBD stone seen<br/>or bili >4 + clinical cholangitis| F[ERCP with sphincterotomy<br/>+ stone extraction]
E -->|Intermediate| G[MRCP or EUS]
G --> H{Stone present?}
H -->|Yes| F
H -->|No| I[Laparoscopic cholecystectomy<br/>± intraop cholangiogram]
E -->|Low| I
D --> J[Cholecystectomy after recovery]
F --> J
Choledocholithiasis and cholangitis pathway — ASGE 2019 risk stratification and Tokyo Guidelines management.
Treatment
First-line
Resuscitation: IV fluids, hemodynamic support
Broad-spectrum IV antibiotics covering Gram-negative and anaerobes — piperacillin-tazobactam, ceftriaxone + metronidazole, or carbapenem for severe sepsis/multi-drug-resistant risk
URGENT biliary drainage by ERCP with sphincterotomy and stone extraction — within 24-48 h for moderate cholangitis, within 24 h for severe cholangitis
Percutaneous transhepatic cholangiography (PTC) drainage if ERCP fails or contraindicated (post-Roux-en-Y anatomy)
Surgical decompression (open CBD exploration) — rarely required as rescue
Cholecystectomy after recovery (same admission or within 4-6 weeks) to prevent recurrence
Choledocholithiasis WITHOUT cholangitis (high probability of stones)
ERCP with sphincterotomy and stone extraction PRIOR to cholecystectomy (preferred)
Or laparoscopic cholecystectomy with intraoperative cholangiography and laparoscopic CBD exploration
Ascending cholangitis — TG18 severity
Grade I (mild): IV antibiotics + non-urgent biliary drainage within 24-48 h
Grade II (moderate): early biliary drainage (within 24 h) + antibiotics
Grade III (severe — organ dysfunction): emergent drainage + ICU-level care + antibiotics; mortality remains 10-20%
Second-line / adjunct
EUS-guided biliary drainage if ERCP fails
Mechanical lithotripsy, balloon dilation, or large-balloon sphincteroplasty for large or difficult stones
Biliary stent placement if stones cannot be extracted at first ERCP (allows decompression and drainage; second-look ERCP later)
Source control of malignant obstruction with stent (plastic or self-expanding metal)
Complications
Septic shock, multiorgan failure
Hepatic abscess
Acute pancreatitis (post-ERCP or stone-induced)
Bile peritonitis (post-procedure)
Recurrent stones
Secondary biliary cirrhosis (chronic obstruction)
Biliary stricture
Cholangiocarcinoma (chronic biliary inflammation, especially with parasitic infection — recurrent pyogenic cholangitis)
PANCE pearls
Charcot triad (fever + RUQ pain + jaundice) = ascending cholangitis until proven otherwise; Reynolds pentad adds hypotension and altered mental status (severe).
Urgent biliary drainage is the cornerstone of cholangitis treatment — antibiotics alone are insufficient.
ERCP is therapeutic (sphincterotomy + stone extraction) and should be used selectively given pancreatitis risk; for diagnosis, use MRCP or EUS.
Same-admission cholecystectomy after CBD stone extraction reduces readmission and complications (PONCHO trial).
Painless jaundice with palpable distended gallbladder (Courvoisier sign) suggests malignancy (pancreatic head cancer, cholangiocarcinoma) — NOT stones.
Brown pigment stones in Asian patients suggest biliary parasitic infection (Clonorchis, Ascaris) and chronic recurrent cholangitis.
Post-cholecystectomy CBD diameter is normally larger (up to 10 mm) — recalibrate sonographic thresholds.
Mirizzi syndrome: external compression of CBD by cystic duct stone — preoperative MRCP critical to avoid bile duct injury.
References
Tokyo Guidelines TG18 — Kiriyama S et al. Tokyo Guidelines 2018: diagnostic criteria and severity grading of acute cholangitis. J Hepatobiliary Pancreat Sci 2018;25:17-30
ASGE 2019 — ASGE Standards of Practice Committee. ASGE guideline on the role of endoscopy in the evaluation and management of choledocholithiasis. Gastrointest Endosc 2019;89:1075-1105
PONCHO Trial — da Costa DW et al. Same-admission versus interval cholecystectomy for mild gallstone pancreatitis (PONCHO). Lancet 2015;386:1261-1268
Rectal Indomethacin — Elmunzer BJ et al. A Randomized Trial of Rectal Indomethacin to Prevent Post-ERCP Pancreatitis. NEJM 2012;366:1414-1422
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