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Hyperthermic intravesical chemotherapy shows comparable efficacy to BCG with lower dysuria rates in NMIBCTrial Shows HIVEC and BCG Have Similar Results for Bladder Cancer

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Key Takeaway
Consider HIVEC as a comparable efficacy alternative to BCG with superior tolerability in patients with NMIBC.

This meta-analysis evaluated the efficacy and safety of hyperthermic intravesical chemotherapy (HIVEC) compared to bacillus Calmette-Guérin (BCG) instillation in patients with non-muscle invasive bladder cancer (NMIBC). The analysis included 820 patients across various study designs.

Primary outcomes, including 24-month recurrence-free survival (RFS), progression-free survival (PFS), and overall survival (OS), showed no significant differences between HIVEC and BCG (RR=1.01; RR=1.00; RR=0.99, respectively). Secondary safety outcomes indicated that while both treatments were associated with urinary tract infections, hematuria, and pain, there was no significant difference in these events between the two groups.

However, a significant difference was observed regarding tolerability. BCG was associated with a significantly higher incidence of dysuria (RR=1.38) compared to HIVEC. These findings suggest that HIVEC is a viable alternative for NMIBC management, particularly in scenarios involving BCG shortages or for patients who are intolerant to the side effects of BCG.

How this fits prior evidence

This meta-analysis confirms that HIVEC provides comparable efficacy to BCG for non-muscle invasive bladder cancer (NMIBC). It addresses gaps regarding treatment alternatives by showing no significant differences in recurrence-free survival, progression-free survival, or overall survival between the two. This finding supports other established options such as intravesical gemcitabine/docetaxel and BCG plus mitomycin as viable pathways for NMIBC management.

Researchers looked at the effectiveness of two different treatments for non-muscle invasive bladder cancer (NMIBC). The study compared hyperthermic intravesical chemotherapy (HIVEC) with a common treatment called bacillus Calmette-Guérin (BCG). They tracked 820 patients over a period of 24 months to see how well each treatment worked.

The results showed that both HIVEC and BCG were equally effective. There were no significant differences between the two methods regarding recurrence-free survival, progression-free survival, or overall survival. This means both treatments performed similarly in keeping the cancer from returning or spreading during the study period.

However, there was a difference in how patients felt during treatment. Patients receiving BCG reported significantly higher rates of dysuria, which is pain during urination. Because of this, HIVEC may be a more tolerable option for some people. It could be a helpful alternative for patients who cannot tolerate BCG or when BCG supplies are low.

What this means for you:
Both HIVEC and BCG show similar success rates for bladder cancer, but HIVEC may cause less pain during treatment.

Common questions

How do the two treatments compare in terms of success?

The study found no significant differences between HIVEC and BCG regarding recurrence-free survival, progression-free survival, or overall survival. Both methods were equally effective at managing non-muscle invasive bladder cancer over a 24-month period.

Are there any side effects for these treatments?

Both treatments showed similar rates of urinary tract infections, hematuria, and pain. However, patients receiving BCG had a significantly higher incidence of dysuria (painful urination) compared to those receiving HIVEC.

When is HIVEC a good alternative to BCG?

HIVEC can be a viable alternative for patients who are not able to tolerate the side effects of BCG. It may also be used as an option when there are shortages of the BCG treatment.

Study Details

Study typeMeta analysis
Sample sizen = 820
EvidenceLevel 1
Follow-up24.0 mo
PublishedJul 2026
View Original Abstract ↓
OBJECTIVE: To systematically evaluate the comparative efficacy and safety of hyperthermic intravesical chemotherapy (HIVEC) versus bacillus Calmette-Guérin (BCG) instillation in patients with non-muscle-invasive bladder cancer (NMIBC). METHODS: A systematic literature search was conducted across PubMed, Embase, the Cochrane Library, and CBM from inception to June 30, 2025, following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The study protocol was registered in the International Prospective Register of Systematic Reviews (PROSPERO) under registration number CRD420251075299. Randomized controlled trials and cohort studies comparing HIVEC with BCG in NMIBC patients were included. Primary outcomes were 24-month recurrence-free survival (RFS), progression-free survival (PFS), and overall survival (OS). Secondary outcomes included adverse events. Risk ratios (RRs) or hazard ratios (HRs) with 95% confidence intervals (CIs) were pooled using fixed- or random-effects models. RESULTS: Seven studies involving 820 patients were included. The meta-analysis showed no significant differences between HIVEC and BCG in 24-month RFS (RR = 1.01, 95% CI: 0.90-1.12), PFS (RR = 1.00, 95% CI: 0.95-1.05), or OS (RR = 0.99, 95% CI: 0.91-1.09). However, BCG was associated with a significantly higher incidence of dysuria (RR = 1.38, 95% CI: 0.57-3.37). No significant differences were observed in other adverse events such as urinary tract infection, hematuria, or pain. CONCLUSION: HIVEC demonstrates comparable oncological efficacy to BCG in terms of 24-month RFS, PFS, and OS for NMIBC patients, while offering a better tolerability profile with a significantly lower risk of dysuria. These findings support HIVEC as a valuable alternative treatment option, particularly in the context of BCG shortages or for BCG-intolerant patients.
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