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Guidelines send everyone whose chance-found gallbladder cancer has just reached the muscle layer back for liver and lymph node surgery, yet the largest international series found 95 in 100 alive without the disease at five years whether or not they had it. A prospective study could spare thousands of operations, or confirm they are needed.
In 237 T1b patients from 14 centres in Korea, Japan, Chile and the United States, five-year disease-specific survival was 93.7 percent after simple cholecystectomy and 95.5 percent after extended cholecystectomy (p=0.496), with no difference by nodes or location (Kim 2018). Pawlik's series found no liver residual disease in T1 tumours but nodal metastasis in 12.5 percent. The evidence is retrospective and confounded by selection, and T1b itself is hard to standardise on pathology. A prospective registry with central pathology review, or a non-inferiority trial of observation with imaging surveillance against extended cholecystectomy, is the missing study.
The strongest data against routine re-resection for T1b tumours, which guidelines still recommend. A prospective study or registry with standardised pathology is the missing step; the authors' own conclusion is that extended cholecystectomy is not needed for T1b.
This is the observational backbone of the rule that T1b or deeper incidental cancers should be re-resected, and of resecting the bile duct only when the cystic duct margin is positive.
Shares Incidental gallbladder cancer (found after cholecystectomy), TNM staging, Gallbladder cancer roadmap: from a chance finding at gallstone surgery to a disease with its own trials, Gallbladder cancer and the tag gallbladder-evidence.
Shares Incidental gallbladder cancer (found after cholecystectomy), Radical (extended) cholecystectomy, Gallbladder cancer roadmap: from a chance finding at gallstone surgery to a disease with its own trials, Gallbladder cancer and the tag gallbladder-evidence.
Shares Incidental gallbladder cancer (found after cholecystectomy), Radical (extended) cholecystectomy, Gallbladder cancer roadmap: from a chance finding at gallstone surgery to a disease with its own trials, Gallbladder cancer and the tag gallbladder-evidence.
Shares Incidental gallbladder cancer (found after cholecystectomy), Radical (extended) cholecystectomy, Gallbladder cancer roadmap: from a chance finding at gallstone surgery to a disease with its own trials, Gallbladder cancer and the tag gallbladder-evidence.
Shares De-escalation, escalation and response-adapted therapy, Radical (extended) cholecystectomy, Gallbladder cancer roadmap: from a chance finding at gallstone surgery to a disease with its own trials, Surgery and radiotherapy cure most, get least and the tag gallbladder-evidence.
Shares Incidental gallbladder cancer (found after cholecystectomy), Radical (extended) cholecystectomy, Gallbladder cancer roadmap: from a chance finding at gallstone surgery to a disease with its own trials, Gallbladder cancer and the tag gallbladder-evidence.
Shares Incidental gallbladder cancer (found after cholecystectomy), Radical (extended) cholecystectomy, Gallbladder cancer roadmap: from a chance finding at gallstone surgery to a disease with its own trials, Gallbladder cancer and the tag gallbladder-evidence.
Shares Incidental gallbladder cancer (found after cholecystectomy), Radical (extended) cholecystectomy, Gallbladder cancer roadmap: from a chance finding at gallstone surgery to a disease with its own trials, Trial design, endpoints and cost and the tag gallbladder-evidence.