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Comparison of therapeutic features and oncologic outcome in patients with pN1 prostate cancer among robot-assisted, laparoscopic, or open radical prostatectomy

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Abstract

Objectives

To compare the therapeutic features and oncological outcomes of robot-assisted radical prostatectomy (RARP) with those of open radical prostatectomy (ORP) or laparoscopic radical prostatectomy (LRP) in lymph node (LN) positive prostate cancer patients in a retrospective observational multi-institutional study.

Patients and methods

We evaluated the clinical results of 561 patients across 33 institutions who underwent RARP, LRP, or ORP and who were diagnosed with LN-positive prostate cancer during RP with pelvic LN dissection (PLND). We determined the following survival outcomes: metastasis-free survival, overall survival, cancer-specific survival, and biochemical recurrence-free survival. The Kaplan–Meier method, log-rank test, and Cox proportional hazards regression model were used to evaluate the effect of treatment on oncological outcomes. Statistical significance was set at P < 0.05.

Results

There was no significant difference for any of the survival outcomes between the three surgical groups. However, RARP achieved a greater LN yield compared to that of ORP or LRP. When the extent of PLND was limited to the obturator LNs, the number of removed LNs (RLNs) was comparable between the three surgical groups. However, higher numbers of RLNs were achieved with RARP compared to the number of RLNs with ORP (P < 0.001) when PLND was extended to the external and/or internal iliac LNs.

Conclusion

RARP, LRP, and ORP provided equal surgical outcomes for pN1 prostate cancer, and the prognosis was relatively good for all procedures. Increased numbers of RLNs may not necessarily affect the oncological outcome.

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Data availability

The datasets generated and/ or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We thank Jane Charbonneau, DVM, from Edanz (https://jp.edanz.com/ac) for editing a draft of this manuscript.

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Correspondence to Yoshiyuki Matsui.

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10147_2022_2278_MOESM1_ESM.pptx

Supplementary Table 1. Number of lymph node dissections according to surgical modality. Supplementary Table 2. The rate of cases stratified by the number of lymph nodes involved (LNI) according to surgical modality. Supplementary Figure 1. Kaplan–Meier curve for metastasis-free survival (MFS) according to surgical modality by the number of lymph nodes involved (LNI). (a) number of LNI = 1; (b) number of LNI ≥ 2. Supplementary Figure 2. Kaplan–Meier curve for different oncological outcomes between open radical prostatectomy (ORP) and robot-assisted radical prostatectomy (RARP) with extended pelvic lymph node dissection (ePLND): (a) metastasis-free survival (MFS), (b) overall survival (OS), (c) cancer-specific survival (CSS), and (d) biochemical recurrence-free survival (BRFS). Supplementary Figure 3. Kaplan–Meier curves for different oncological outcomes between open radical prostatectomy (ORP) and robot-assisted radical prostatectomy (RARP) with limited pelvic lymph node dissection (PLND): (a) metastasis-free survival (MFS), (b) overall survival (OS), (c) cancer-specific survival (CSS), and (d) biochemical recurrence-free survival (BRFS). Supplementary Figure 4. Kaplan–Meier curve for postprostatectomy-persistent prostate-specific antigen (PSA) according to surgical modality

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Kirisawa, T., Shiota, M., Kimura, T. et al. Comparison of therapeutic features and oncologic outcome in patients with pN1 prostate cancer among robot-assisted, laparoscopic, or open radical prostatectomy. Int J Clin Oncol 28, 306–313 (2023). https://doi.org/10.1007/s10147-022-02278-7

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  • DOI: https://doi.org/10.1007/s10147-022-02278-7

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