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Videosurgery and Other Miniinvasive Techniques
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1/2021
vol. 16
 
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Urology
abstract:
Original paper

En-bloc resection of urinary bladder tumour – a prospective controlled multicentre observational study

Sławomir Poletajew
1
,
Wojciech Krajewski
2
,
Paweł Stelmach
3
,
Jan Adamowicz
4
,
Łukasz Nowak
2
,
Marco Moschini
5
,
Piotr Zapała
6
,
Tomasz Drewa
4
,
Andrzej Paradysz
3
,
Piotr Radziszewski
6
,
Romuald Zdrojowy
2
,
Piotr Kryst
1

  1. Second Department of Urology, Centre of Postgraduate Medical Education, Warsaw, Poland
  2. Department of Urology and Oncological Urology, Wroclaw Medical University, Wroclaw, Poland
  3. Department of Urology, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia in Katowice, Poland
  4. Department of Regenerative Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Poland
  5. Department of Urology, Luzerner Kantonsspital, Luzern, Switzerland
  6. Department of General, Oncological and Functional Urology, Medical University of Warsaw, Warsaw, Poland
Videosurgery Miniinv 2021; 16 (1): 145–150
DOI: https://doi.org/10.5114/wiitm.2020.95399
Online publish date: 2020/05/15
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Introduction
Transurethral resection of bladder tumour (TURBT) is one of the most commonly performed urologic procedures. Because of the shortcomings of conventional TURBT, the en-bloc resection concept was created.

Aim
To analyse the influence of en-bloc technique on surgical and oncological outcomes of TURBT performed with electric current.

Material and methods
This non-randomized, prospective controlled multicentre study enrolled 427 consecutive patients undergoing TURBT performed by five experienced endourologists in five academic institutions. Choice of procedure was at the discretion of the surgeon. The vast majority of patients underwent monopolar resection. The en-bloc procedure was performed with Collin’s knife or the classic resection loop. Study end-points were surgery, catheterization and hospitalization time, presence of muscularis propria (MP) in the specimen and 3-month recurrence-free survival (RFS).

Results
The study included 427 (274 conventional TURBT vs. 153 en-bloc) patients with mean age of 69 years (range: 18–99). There were more cases with MP present in the specimen in the en-bloc group (91.3% vs. 75.5%; p < 0.001). Surgery and hospitalization times were statistically shorter in the en-bloc group (both p < 0.05). A borderline significant difference was noted when the number of residual tumours in reTURBTs was analysed, with fewer cases of residual tumour in the en-bloc group (p = 0.051). RFS at 3 months was higher in the en-bloc group (88.4% vs. 80.1%; p = 0.027). After propensity score matching, differences in MP presence, hospitalization time and 3-month RFS status remained statistically significant.

Conclusions
When compared to conventional TURBT, en-bloc resection of bladder tumour is associated with higher percentage of MP presence in histopathological specimen, higher 3-month RFS and shorter hospitalization time.

keywords:

bladder cancer, transurethral resection, transurethral resection of bladder tumour, en-bloc
  
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