Step 2 CK · Surgery

Complicated Gallbladder Disease & Biliary Neoplasms

Name: Complicated Gallbladder Disease & Biliary Neoplasms
Creator: Veli Bakalov, MD

When the gallbladder turns dangerous and the ducts turn malignant

Surgery·General Surgery·5 min read·9 high-yield points·Reviewed by Veli Bakalov, MD @HemeOncBuddy

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Acalculous cholecystitis strikes critically ill patients (burns, trauma, sepsis, TPN); if unstable, give antibiotics and place a percutaneous cholecystostomy.
Emphysematous cholecystitis (older diabetic men, gas in the gallbladder wall, Clostridium) needs IV antibiotics and urgent cholecystectomy because gangrene and perforation are common.
Gallstone ileus: Rigler triad of small-bowel obstruction, pneumobilia, and an ectopic stone at the terminal ileum → enterolithotomy.
Mirizzi syndrome: a stone in the cystic duct or Hartmann pouch compresses the common hepatic duct, causing jaundice with a normal distal CBD.
Bile leak after cholecystectomy (cystic duct stump, duct of Luschka) → US/CT and HIDA, then percutaneous drainage plus ERCP sphincterotomy and stent.
Bile duct transection → Roux-en-Y hepaticojejunostomy by a hepatobiliary surgeon; the critical view of safety prevents injury.
Cholecystectomy is indicated for gallbladder polyps ≥10 mm, porcelain gallbladder, and biliary dyskinesia with HIDA ejection fraction below 35%.
Incidental gallbladder cancer beyond T1a needs re-resection of liver segments IVb/V with portal lymphadenectomy.
Cholangiocarcinoma risks are PSC, choledochal cysts, and liver flukes; a Klatskin tumor dilates intrahepatic ducts with a normal CBD and collapsed gallbladder.

High-risk cholecystitis

Acalculous cholecystitis. Bile stasis and gallbladder ischemia inflame a stone-free gallbladder in critically ill patients: sepsis, severe burns, major trauma or surgery, TPN, prolonged fasting, mechanical ventilation. Fever or unexplained sepsis may be the only clue in a sedated patient, and early gangrene and perforation make mortality high. Bedside ultrasound shows a distended, thick-walled gallbladder with sludge and pericholecystic fluid; HIDA helps when ultrasound is equivocal.

Emphysematous cholecystitis. Compromise of the cystic artery lets gas-forming organisms (Clostridium perfringens, E. coli, Klebsiella) invade the wall. It favors older men, many of them diabetic, and up to half have no stones. Gas outlines the wall or lumen on plain film, ultrasound, or CT.

Gangrene and perforation. Transmural necrosis follows delayed care, especially in the elderly and diabetics. A dead, denervated wall can abolish the sonographic Murphy sign, a falsely reassuring finding. Free perforation causes bile peritonitis, contained perforation a pericholecystic abscess, and chronic perforation a cholecystoenteric fistula.

High-risk variants of cholecystitis

Variant	Typical patient	Key finding	Management
Acalculous	ICU: burns, trauma, sepsis, TPN	Distended, thick-walled gallbladder without stones	Antibiotics; percutaneous cholecystostomy if unstable, cholecystectomy if fit
Emphysematous	Older diabetic men	Gas in wall or lumen	Antibiotics with anaerobic coverage; urgent cholecystectomy
Gangrenous or perforated	Delayed presentation, elderly, diabetic	Sepsis, absent sonographic Murphy, abscess or free bile	Emergent cholecystectomy and drainage

Percutaneous cholecystostomy bridges any variant when the patient is too unstable for surgery.

Stone complications outside the gallbladder

Gallstone ileus. A mechanical obstruction, not an ileus. In elderly women, a large stone (usually >2.5 cm) erodes through a cholecystoduodenal fistula and jams in the narrowest segment, the terminal ileum near the ileocecal valve; obstruction is often intermittent ("tumbling") as the stone moves. CT shows Rigler triad: small-bowel obstruction, pneumobilia, and an ectopic stone. Treatment is laparotomy with enterolithotomy, checking for further stones; cholecystectomy and fistula closure are deferred or omitted in frail patients. A stone lodged in the duodenal bulb instead causes gastric outlet obstruction (Bouveret syndrome).

Mirizzi syndrome. A stone impacted in the cystic duct or Hartmann pouch compresses the common hepatic duct, adding obstructive jaundice to cholecystitis, and may erode into the duct as a cholecystocholedochal fistula. Imaging shows a dilated duct above the stone and a normal common bile duct below. ERCP defines the anatomy and stents the duct; cholecystectomy, often open or subtotal, is definitive. The fused triangle of Calot invites duct injury, and the syndrome is associated with gallbladder cancer.

Bile leak and duct injury after cholecystectomy

Bile leak. Usually from the cystic duct stump or a small duct of Luschka in the gallbladder bed, appearing days after surgery as RUQ pain, fever, bloating, bilious drain output, and a mild bilirubin rise.

Ultrasound or CTFinds a biloma or free fluid in the gallbladder fossa
HIDA scanTracer outside the biliary tree confirms an active leak
Percutaneous drainageEvacuates the biloma and controls sepsis
ERCP sphincterotomy and stentLowers the transpapillary pressure gradient so the leak seals, usually within weeks

Major duct injury. Classically the common bile duct is mistaken for the cystic duct; clipping causes progressive jaundice and transection causes bile peritonitis. MRCP, ERCP, or percutaneous transhepatic cholangiography defines the level. After sepsis is controlled, transection or stricture is repaired with a Roux-en-Y hepaticojejunostomy by a hepatobiliary surgeon; duct-to-duct repair tends to stricture. The critical view of safety, with only two structures entering the gallbladder before clipping, prevents misidentification.

Dyskinesia, polyps, and gallbladder cancer

Biliary dyskinesia. Typical biliary colic with no stones, normal labs, and a normal EGD calls for a CCK-stimulated HIDA scan. An ejection fraction below 35% supports the diagnosis, and laparoscopic cholecystectomy relieves pain in most patients.

Polyps and porcelain gallbladder. Most small polyps are cholesterol pseudopolyps. Polyps ≥10 mm, or those that grow or cause symptoms, warrant cholecystectomy, and in PSC the threshold drops to about 8 mm (AASLD 2022); smaller polyps are followed with serial ultrasound. A porcelain gallbladder (calcified wall) is removed because of its cancer association.

Gallbladder carcinoma. An adenocarcinoma chiefly of older women with long-standing large stones; other risks are porcelain gallbladder, large polyps, anomalous pancreaticobiliary junction, and chronic Salmonella Typhi carriage, with high rates in Chile, northern India, and Native American populations. Many are incidental findings after cholecystectomy; symptomatic tumors (pain, weight loss, jaundice) have usually invaded the liver. Incidental T1a disease needs nothing more; T1b or deeper is re-resected with liver segments IVb/V and a portal lymphadenectomy.

Cholangiocarcinoma and choledochal cysts

Risk factors. Chronic biliary inflammation drives bile duct adenocarcinoma: primary sclerosing cholangitis (the leading Western risk, often with ulcerative colitis), choledochal cysts, liver flukes (Clonorchis sinensis, Opisthorchis viverrini, acquired from raw freshwater fish in East and Southeast Asia), hepatolithiasis, and chronic hepatitis B or C for intrahepatic tumors.

Presentation and workup. Painless jaundice, pruritus, and weight loss; CA 19-9 is often high but nonspecific. Perihilar (Klatskin) tumors at the hepatic duct confluence are most common. MRI/MRCP (or CT) maps extent after ultrasound, and ERCP provides brushings and stent decompression. Resection (partial hepatectomy with bile duct excision and hepaticojejunostomy for hilar tumors, Whipple for distal ones) is the only cure; unresectable disease gets stenting and gemcitabine-cisplatin–based chemotherapy.

Reading the level of biliary obstruction

Feature	Hilar (Klatskin) tumor	Distal CBD or pancreatic head tumor
Intrahepatic ducts	Dilated	Dilated
Common bile duct	Normal caliber	Dilated
Gallbladder	Collapsed, not palpable	Distended; Courvoisier sign

Choledochal cysts. Congenital biliary dilation linked to an anomalous pancreaticobiliary junction that lets pancreatic juice reflux into the ducts. Todani type I (extrahepatic) is most common; type V is Caroli disease of the intrahepatic ducts. Children, more often girls and East Asians, present with pain, jaundice, and a RUQ mass. Because cholangitis, stones, pancreatitis, and cholangiocarcinoma follow, treatment is complete excision with Roux-en-Y hepaticojejunostomy, never internal drainage.