- Design
- Retrospective analysis of a prospectively maintained single-centre database
- Population
- 330 patients with gallbladder cancer undergoing staging laparoscopy
- Primary outcome
- Diagnostic yield of laparoscopy over cross-sectional imaging
- Effect
- Occult metastatic or unresectable disease in 11.5% (38/330)
A high-volume referral centre analysed 330 patients with gallbladder cancer who had staging laparoscopy, either before planned radical cholecystectomy (210) or before starting systemic therapy (120). Positive PET-CT results were excluded, because those patients would not have gone straight to laparoscopy.
Laparoscopy found metastatic or unresectable disease missed by imaging in 11.5% (38 patients). Half of these were para-aortic 16b1 node metastases, 40% were locally unresectable disease from right hepatic artery encasement, and a few were peritoneal or liver deposits. Equivocal uptake on PET-CT and previous neoadjuvant chemotherapy predicted a positive laparoscopy.
Gallbladder cancer is common in northern India, and many patients present late. A short laparoscopy that spares one in nine patients a non-therapeutic laparotomy is a good trade. The finding that half the occult disease was nodal also argues for sampling the para-aortic nodes early in the operation.
- Consider staging laparoscopy before radical cholecystectomy for gallbladder cancer, even when imaging looks resectable.
- Sample the para-aortic (16b1) nodes at the start of the operation and send for frozen section where available.
- Lower your threshold further when PET-CT is equivocal or after neoadjuvant chemotherapy.
- Check for right hepatic artery encasement at the porta before committing to resection.
Why it matters
About one in nine patients who look resectable on imaging may be spared an open operation that cannot help them.
Don't overread it
This is a single-centre series without a comparison group; the yield will be lower where patients present earlier.
The statistics, in plain English
A yield of 11.5% means about 12 in every 100 patients had disease found only at laparoscopy. The predictors come from regression in a single cohort and have not been validated elsewhere.
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