Clinical Scorecard: Impact of Energy Source on Outcomes in En Bloc Transurethral Resection of Bladder Tumors: A Secondary Analysis of a Randomized Study
At a Glance
Category
Detail
Condition
Non-muscle invasive urinary bladder cancer (UBC)
Key Mechanisms
En bloc transurethral resection of bladder tumor (ERBT) using different energy sources (monopolar, bipolar, laser) to improve specimen quality and staging accuracy
Target Population
Patients with primary papillary non-muscle invasive bladder carcinoma (cTa or cT1), tumor size 1-3 cm, up to three lesions, no metastases
Care Setting
Multicentric European referral centers performing endoscopic bladder tumor resections
Key Highlights
ERBT improves specimen integrity and orientation compared to conventional TURB, enhancing pathological staging accuracy.
Presence of detrusor muscle (DM) in resected specimens is a key quality indicator and prognostic factor; DM was present in approximately 81% of ERBT specimens across energy modalities.
No significant difference in DM presence or perioperative outcomes was observed between monopolar, bipolar, and laser energy sources used during ERBT.
Guideline-Based Recommendations
Diagnosis
Use ERBT with enhanced visualization techniques (PDD, narrowband imaging, IMAGE1 S) for accurate tumor resection and pathological assessment.
Ensure pathological evaluation includes assessment of detrusor muscle presence, resection margins, variant histology, lymphovascular invasion, and carcinoma in situ.
Management
Perform ERBT with a 5–10 mm margin around the tumor to maintain specimen integrity.
Select energy modality (monopolar, bipolar, laser) based on surgeon preference and available instrumentation, as outcomes are comparable.
Administer single-dose intravesical chemotherapy postoperatively at surgeon’s discretion.
Monitoring & Follow-up
Systematically report adverse events using CTCAE criteria.
Monitor for obturator nerve reflex, bladder perforation, and need for conversion to conventional TURB intraoperatively.
Follow patients for recurrence using Kaplan–Meier survival analysis.
Risks
Potential for bladder perforation if resection depth reaches perivesical fat.
Risk of understaging if detrusor muscle is absent in specimen.
Thermal artifacts and specimen fragmentation with conventional TURB may impair pathological assessment.
Patient & Prescribing Data
188 patients with 237 non-muscle invasive bladder tumors undergoing ERBT
ERBT using monopolar, bipolar, or laser energy sources yields high rates (~81%) of detrusor muscle presence in specimens, indicating good resection quality; no significant differences in perioperative outcomes among energy types.
Clinical Best Practices
Standardize operation reports using checklists to ensure consistency across centers.
Employ enhanced visualization techniques during ERBT to improve tumor margin delineation.
Avoid supplementary biopsies from tumor base when ERBT specimen quality is adequate.
Use logistic and Cox regression analyses to evaluate associations between energy source and pathological or clinical outcomes in research settings.
by Stefano Mancon, Francesco Soria, Rodolfo Hurle, Dmitry Enikeev, Evanguelos Xylinas, Lukas Lusuardi, Axel Heidenreich, Paolo Gontero, Eva Compérat, Shahrokh F. Shariat, David D’Andrea
