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Systematic review of extended versus standard pelvic lymph node dissection in bladder cancer surgeryMore Lymph Nodes Removed, Better Survival — But at What Cost?

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Key Takeaway
Consider extended PLND for bladder cancer survival but note increased severe complication risk.

This systematic review evaluated the effects of extended pelvic lymph node dissection (PLND) reaching the inferior mesenteric artery versus standard PLND up to the bifurcation of the internal and external iliac artery. The analysis included 993 randomized participants with urothelial carcinoma of the bladder, stratified by muscle-invasive (cT2 and cT4a) or treatment-refractory non-muscle-invasive (cT1 with or without carcinoma in situ) disease.

Regarding survival, extended PLND likely extends time to death from bladder cancer (HR 0.65, 95% CI 0.44 to 0.97), representing 106 fewer deaths per 1000 participants. Conversely, there was little to no difference in time to death from any cause (HR 0.99, 95% CI 0.75 to 1.30) or time to recurrence (HR 0.96, 95% CI 0.71 to 1.31).

Safety outcomes indicated that extended PLND likely increases severe complications (Clavien-Dindo grade III-V) with a relative risk of 1.22 (95% CI 1.06 to 1.41), corresponding to 86 more complications per 1000 participants. Rates of minor complications (Clavien-Dindo grade I-II) were likely similar between groups (RR 0.85, 95% CI 0.73 to 1.00). The certainty of evidence for most outcomes was moderate to low, primarily downgraded due to imprecision.

Clinicians should weigh the potential survival benefit against the increased risk of severe surgical complications when considering extended PLND. The review notes that adverse events beyond the specified complication grades were not reported, and discontinuations were not reported.

  • Extended lymph node removal may save more lives from bladder cancer
  • Helps patients facing major bladder surgery
  • Not standard yet — higher risk of serious complications

This surgery could help some live longer, but it’s not risk-free.

Tom, 68, just got the news: his bladder cancer has spread deeper. Surgery is next. His doctor talks about removing lymph nodes — but how many? A standard number? Or go further, removing more tissue to catch hidden cancer? It sounds logical. But more surgery isn’t always better. What if it only adds risk?

Now, new evidence is helping patients like Tom weigh the trade-offs.

Bladder cancer affects hundreds of thousands worldwide. When it grows into the muscle layer, doctors often remove the entire bladder — a major surgery called radical cystectomy. Lymph nodes near the bladder are often removed too, because cancer can hide there.

But how much should surgeons take?

For years, two approaches have been used: standard dissection removes nodes around the pelvis. Extended goes further — up near the main artery in the belly. The hope: catch more cancer early. The fear: more complications.

Many patients don’t realize this choice even exists — or that it could affect their survival.

The surprising shift

Doctors once thought: remove more, cure more. But without solid proof, it stayed a theory.

Now, two rigorous trials involving nearly 1,000 patients have compared the two methods head to head.

Here’s the twist: removing more lymph nodes didn’t help people live longer overall. But it did help more survive bladder cancer specifically.

That’s a big deal.

A cleaner sweep, fewer cancer deaths

Think of lymph nodes like checkpoints along a highway. Cancer cells can escape the bladder and travel through these routes. Standard surgery clears the local exits. Extended surgery goes further — clearing the next stretch of road.

By removing more nodes, surgeons may catch stray cancer cells before they take hold.

It’s not about removing the bladder. It’s about cleaning up what might be left behind.

Researchers combined data from two randomized trials. All patients had muscle-invasive or stubborn non-muscle-invasive bladder cancer. Half had extended removal — up to the inferior mesenteric artery. Half had standard — only to the pelvic fork. Both groups had the same type of bladder surgery.

Follow-up lasted up to five years.

Fewer cancer deaths — but not more overall survival

Patients with extended removal were 35% less likely to die from bladder cancer within five years.

That’s 106 fewer cancer deaths per 1,000 patients.

But when looking at all causes of death, there was no clear difference. For every 1,000 patients, about the same number died — whether they had more or less tissue removed.

Why? Because while cancer deaths dropped, other risks went up.

More surgery, more risks

Extended removal led to more serious complications — things like blood clots, infections, or bowel issues needing more treatment.

About 86 more patients per 1,000 had major problems.

That’s not minor. These are hospital stays, extra procedures, real setbacks.

But here’s the catch: minor issues — like mild pain or temporary swelling — were about the same in both groups.

This doesn’t mean this treatment is available yet.

What experts see

The data suggest a real trade-off: a better chance of beating cancer, but a higher risk of serious side effects.

Experts say this isn’t a one-size-fits-all answer. For younger, healthier patients, the extra surgery might be worth it. For others, the risks may outweigh the benefits.

It’s not just about survival. It’s about how you survive.

If you or a loved one is facing bladder removal surgery, this choice matters.

But extended lymph node removal is not standard everywhere. Some surgeons already use it. Others wait for more proof.

Talk to your surgical team. Ask: “Are you removing lymph nodes? How far do you go?” It’s a valid question.

Don’t assume more is better — but know it might help in your case.

The hidden gap

One big missing piece? Quality of life. Neither study measured how patients felt after surgery. Did they recover well? Could they return to daily life?

We don’t know.

Also, only two trials exist. More data are needed — especially from diverse hospitals and patient groups.

More research is needed to find out who benefits most. Future trials may use imaging or biomarkers to guide decisions.

For now, this evidence helps surgeons and patients make smarter, more informed choices — balancing hope with real risk.

Study Details

Study typeSystematic review
EvidenceLevel 1
PublishedApr 2026
View Original Abstract ↓
Rationale We are currently uncertain of the benefits and harms of standard pelvic lymph node dissection (PLND) compared to extended PLND in the treatment of urothelial carcinoma of the bladder. Objectives To assess the effects of extended versus standard PLND in people undergoing cystectomy to treat muscle‐invasive (cT2 and cT4a) and treatment‐refractory, non‐muscle‐invasive (cT1 with or without carcinoma in situ) urothelial carcinoma of the bladder. Search methods We conducted a comprehensive literature search using multiple databases (CENTRAL, PubMed, Embase, Web of Science, and LILACS), trial registries, and conference proceedings published up to 24 September 2025, with no restrictions on language or publication status. Eligibility criteria We included randomized controlled trials (RCTs) in which participants underwent radical cystectomy for muscle‐invasive or therapy‐refractory non‐muscle‐invasive urothelial carcinoma of the bladder with either an extended PLND with an upper extent reaching as far as the inferior mesenteric artery, or a standard PLND up to the bifurcation of the internal and external iliac artery, with otherwise the same anatomical boundaries. Outcomes Critical outcomes were time to death from any cause (assessed at five years), time to death from bladder cancer (assessed at five years), and Clavien‐Dindo classification of surgical complications grade III‐V (assessed up to 90 days' postoperatively). Important outcomes were time to recurrence (assessed at five years), Clavien‐Dindo I‐II complications (assessed up to 90 days' postoperatively), and disease‐specific quality of life. Risk of bias We used the Cochrane RoB 2 tool to assess the risk of bias in the included studies. Synthesis methods We conducted statistical analyses according to the guidance in the Cochrane Handbook for Systematic Reviews of Interventions. We combined the results for each outcome using a meta‐analysis with a random‐effects model. We employed GRADE to evaluate the certainty of the evidence. Included studies We included two RCTs with 993 randomized participants (extended PLND 490, standard PLND 503). Both studies were published in full text. The median age of both groups was similar, ranging from 67 to 69 years for the extended group and 68 years for the standard group. All participants had locally completely resectable, invasive urothelial bladder cancer. Synthesis of results Overall, the certainty of evidence for most outcomes was moderate to low, primarily downgraded due to imprecision. Time to death from any cause Extended PLND may result in little to no difference in time to death from any cause as compared to standard PLND (hazard ratio [HR] 0.99, 95% confidence interval [CI] 0.75 to 1.30; 2 studies, 993 participants; low‐certainty evidence). Based on the control event risk of 43.0% at five‐year follow‐up, this corresponds to 3 fewer deaths from any cause (95% CI 86 fewer to 88 more) per 1000 participants. Time to death from bladder cancer Extended PLND likely extends the time to death from bladder cancer as compared to standard PLND (HR 0.65, 95% CI 0.44 to 0.97; 1 study, 401 participants; moderate‐certainty evidence). Based on the control event risk of 35.0% at five‐year follow‐up, this corresponds to 106 fewer deaths from bladder cancer (95% CI 177 fewer to 8 fewer) per 1000 participants. Clavien‐Dindo grade ≥ 3 complications (up to 90 days) Extended PLND likely increases Clavien‐Dindo grade ≥ 3 complications as compared to standard PLND (risk ratio [RR] 1.22, 95% CI 1.06 to 1.41; 2 studies; 993 participants; moderate‐certainty evidence). Based on the control event risk of 39.0% at 90‐day follow‐up, this corresponds to 86 more complications (95% CI 23 more to 160 more) per 1000 participants. Time to recurrence Extended PLND may result in little to no difference in time to recurrence as compared to standard PLND (HR 0.96, 95% CI 0.71 to 1.31; 2 studies, 993 participants; low‐certainty evidence). Based on the control event risk of 40.0% at five‐year follow‐up, this corresponds to 12 fewer recurrences (95% CI 96 fewer to 88 more) per 1000 participants. Clavien‐Dindo grade ≤ 2 complications (up to 90 days) Extended PLND likely results in similar Clavien‐Dindo grade ≤ 2 complications as compared to standard PLND (RR 0.85, 95% CI 0.73 to 1.00; 2 studies, 993 participants; moderate‐certainty evidence). Based on the control event risk of 40.2% at 90‐day follow‐up, this corresponds to 60 fewer complications (95% CI 108 fewer to 0 fewer) per 1000 participants. Disease‐specific quality of life No studies reported this outcome. Authors' conclusions This updated systematic review synthesizes the evidence from the two available RCTs in this field. We found that extended PLND likely improves bladder cancer‐specific survival; however, it may result in little to no difference in overall survival or recurrence‐free survival. Extended PLND likely increases severe complications (Clavien‐Dindo grade ≥ 3), while likely showing similar rates of minor complications (grade ≤ 2) at 90‐day follow‐up compared to standard PLND. These findings underscore the trade‐offs of potential oncologic benefits of extended PLND versus the increased risk of serious complications in patients undergoing radical cystectomy. Funding None Registration Protocol (2018) available via https://www.crd.york.ac.uk/PROSPERO/view/CRD42018116290 Original review (2019) DOI: 10.1002/14651858.CD013336 PICOs PICOs Population Intervention Comparison Outcome
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