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Biliary tumours — gallbladder cancer and cholangiocarcinoma
Gallbladder cancer is often found incidentally after cholecystectomy, and the stage (depth of invasion) decides whether further surgery is needed; cholangiocarcinoma presents with painless jaundice, and its site — intrahepatic, hilar or distal — decides the operation.
Why it matters in the exam
Questions on gallbladder cancer mainly test the scenario of an incidental histological finding after cholecystectomy: a tumour confined to the mucosa (T1a) — the cholecystectomy is enough; a tumour invading the muscle layer or deeper (T1b or higher) — further surgery including resection of the liver bed (segments IVb and V) and lymph node dissection. Risk factors: large stones, a "porcelain" gallbladder, polyps of 10 mm or more and PSC.
For cholangiocarcinoma candidates are asked about risk factors (PSC — with annual imaging, choledochal cyst, liver flukes) and presentation: painless jaundice with dilatation of the intrahepatic ducts only, without dilatation of the common bile duct, points to a hilar (Klatskin) tumour. Work-up is MRCP and CT, and CA 19-9 helps. The curative treatment is resection with clear margins; for a hilar tumour liver transplantation is sometimes chosen in selected centres, and adjuvant chemotherapy follows resection. A choledochal cyst is excised completely with a hepaticojejunostomy because of the risk of malignancy.
Key points
- Incidental gallbladder cancer: T1a — enough; T1b or higher — liver bed resection and nodes.
- Risk factors: large stones, porcelain gallbladder, polyp of 10 mm or more, PSC.
- Klatskin — intrahepatic dilatation only; MRCP and CT.
- Curative treatment — resection with clear margins and adjuvant chemotherapy.
- Choledochal cyst — complete excision and hepaticojejunostomy.
Summary table
| Situation | Finding | Treatment |
|---|---|---|
| Gallbladder cancer T1a (incidental) | Confined to the mucosa | The cholecystectomy already done is enough |
| Gallbladder cancer T1b or higher (incidental) | Invasion of the muscle layer or deeper | Further surgery: liver bed resection (IVb and V) and lymph nodes |
| Risk factors for gallbladder cancer | Large stones, porcelain gallbladder, polyp of 10 mm or more, PSC | Preventive cholecystectomy as indicated |
| Hilar cholangiocarcinoma (Klatskin) | Painless jaundice; intrahepatic dilatation only | MRCP and CT; resection with hepatectomy; transplantation in selected centres |
| Distal cholangiocarcinoma | Jaundice with dilatation of the whole common bile duct | Whipple |
| Choledochal cyst | Congenital dilatation of the bile ducts | Complete excision and hepaticojejunostomy |
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Sources
- NCCN Clinical Practice Guidelines in Oncology: Biliary Tract Cancers, 2025 — Gallbladder cancer and cholangiocarcinoma
- ESMO Clinical Practice Guideline: Biliary tract cancer, 2023 — Diagnosis, resection and systemic therapy
- Sabiston Textbook of Surgery, 21st edition (2022) — The Biliary System
Sources are given for further reading; the text is written afresh and not copied from them.
Reviewed by the Examqo AI Professor · 2026-11-02. The text may contain errors; when in doubt, check the source.