Ultra-early versus early salvage androgen deprivation therapy for post-prostatectomy biochemical recurrence in pT2-4N0M0 prostate cancer

Updated evidence on oncological outcomes of surgery versus external beam radiotherapy for localized prostate cancer

Radical prostatectomy and external beam radiotherapy are recognized as comparable treatment options for localized prostate cancer. Previous studies of oncological outcomes of surgery versus radiotherapy have reported their comparability or possible superiority of surgery. However, the issue of which treatment is better remains controversial. Several factors make fair comparison of their outcomes difficult: different patient backgrounds caused by selection bias, different definitions of biochemical recurrence and different complication profiles between the treatment modalities. In 2016, the first large randomized controlled trial was published, which compared radical prostatectomy, external beam radiotherapy and active monitoring in localized prostate cancer. More recently, another study has reported comparative outcomes of robot-assisted radical prostatectomy and volumetric modulated arc therapy, as the leading surgery and radiotherapy techniques, respectively. Furthermore, there has been a trend toward combining external beam radiotherapy with brachytherapy boost, especially in patients with high-risk prostate cancer. This review summarizes the updated evidence on oncological outcomes of surgery versus external beam radiotherapy for localized prostate cancer.

The Relationships between Survivals and Early Salvage Androgen Deprivation Therapy for Non-Organ Confined Prostate Cancer after Radical Prostatectomy

Androgen deprivation therapy (ADT) is one salvage treatment used when prostate-specific antigen (PSA) recurs after radical prostatectomy (RP), especially in high-risk prostate cancer (PC) patients. However, the optimal timing for salvage ADT (SADT) is still unclear. In this study, we analyzed the efficacy of early SADT for non-organ confined PC. We investigated pathologically confirmed, non-organ confined PC patients who received SADT for PSA recurrence after RP. Patients with distant metastasis, those with lymph node involvement confirmed by lymph node dissection, and those who received neo-adjuvant or adjuvant therapy were excluded. Early SADT was defined as ADT initiated before PSA levels reached 0.5 ng/ml from the nadir PSA level after RP. Univariable and multivariable Cox regression analyses were performed for distant metastasis-free, PC-specific, and overall survival. Data from 345 patients were analyzed. The median follow-up duration was 82 months. The median PSA level was 10.9 ng/ml. Patients with T3b or T4 stage cancers represented 24.9% of the cohort; those with a Gleason score ≥9 represented 15.1%. The 10-year distant metastasis-free survival, PC-specific survival and overall survival were 87.1%, 92.0%, 80.9%, respectively. In univariable and multivariable Cox regression analyses, SADT that was initiated when PSA levels were less than 0.5 ng/mL was significantly associated with improved distant metastasis-free survival, PC-specific survival, and overall survival in non-organ confined PC. Early SADT initiated in patients with PSA levels <0.5 ng/mL was associated with increased distant metastasis-free survival, PC-specific survival, and overall survival in non-organ confined PC after RP.

A case of synchronous advanced gastric cancer and locally advanced prostate cancer with combined laparoscopic and robotic surgery: A case report

INTRODUCTION

The optimal management strategy for synchronous gastric cancer (GC) and prostate cancer (PCa) remains unclear, particularly in cases in which two cancers are progressive.

PRESENTATION OF CASE

A 68-year-old man diagnosed with synchronous advanced GC and locally advanced PCa was referred to our institution. Laparoscopic total gastrectomy (LTG) and robotic-assisted radical prostatectomy were simultaneously performed. The postoperative course was similar to the standard postoperative course of LTG alone. Pathological diagnoses were T3N3aM0 gastric adenocarcinoma and T3N0M0 prostatic adenocarcinoma. Adjuvant chemotherapy and adjuvant androgen deprivation therapy (ADT) for GC and PCa were initiated on postoperative days 15 and 27, respectively. Six months subsequent to surgery, the patient received adjuvant chemotherapy and ADT, and no evidence of cancer recurrence was observed.

DISCUSSION

In terms of survival, curative resection with adjuvant therapy is advantageous for patients with advanced GC or locally advanced PCa. At present, treatment for synchronous cancer should be combined with optimal management for individual cancers. Minimally invasive surgery may play an important role in the multidisciplinary treatment of synchronous advanced cancer.

CONCLUSION

Combined laparoscopic and robotic surgery for synchronous GC and PCa allows for minimally invasive radical resection and appropriate adjuvant therapy.

Impact of Early Salvage Androgen Deprivation Therapy in Localized Prostate Cancer after Radical Prostatectomy: A Propensity Score Matched Analysis

PURPOSE

Androgen deprivation therapy (ADT) is used as a salvage treatment for men with biochemical recurrence (BCR) of prostate cancer (PCa) following initial radical prostatectomy (RP). The optimal time at which to begin salvage ADT (sADT) remains controversial. In this retrospective study, we evaluated the efficacy of initiating sADT in patients before prostate-specific antigen (PSA) values met the clinical definition of BCR.

MATERIALS AND METHODS

We identified 484 PCa patients who received sADT for BCR after RP. Median follow-up was 82 months. Propensity score matching was performed based on preoperative PSA level, pathologic T stage, and Gleason score. Patients were assigned to two groups of 169 patients each, based on PSA levels at the time of sADT: Group A (without meeting of the definition of BCR) and Group B (after BCR). Kaplan-Meier survival analyses and Cox regression analyses were performed.

RESULTS

The median PSA level at sADT initiation was 0.12 ng/mL in group A and 0.42 ng/mL in group B. Kaplan-Meier analyses showed that group A had favorable disease progression-free survival (DPFS) and distant metastasis-free survival (DMFS), but did not have better cancer-specific survival (CSS) than group B. In subgroup analyses, group A showed better CSS rates in the non-organ confined PCa group. In Cox regression analyses, early sADT was associated significantly with DPFS and DMFS rates, however, did not correlate with CSS (p=0.107).

CONCLUSION

Early sADT after RP improved DPFS and DMFS. Furthermore, early sADT patients demonstrated better CSS in non-organ confined PCa.

Optimal timing of salvage radiotherapy for biochemical recurrence after radical prostatectomy: is ultra-early salvage radiotherapy beneficial?

Background

The optimal timing of salvage radiotherapy for biochemical recurrence after radical prostatectomy is controversial. In particular, the prognostic significance of salvage radiotherapy delivered before a current definition of biochemical recurrence, i.e. ultra-early salvage radiotherapy, is unclear.

Methods

We reviewed 76 patients with pT2-3N0M0 prostate cancer who underwent salvage radiotherapy for post-prostatectomy biochemical recurrence at the following three timings: ultra-early salvage radiotherapy (n = 20) delivered before meeting a current definition of biochemical recurrence (two consecutive prostate-specific antigen [PSA] values ≥0.2 ng/mL); early salvage radiotherapy (n = 40) delivered after meeting the definition but before PSA reached 0.5 ng/mL; and delayed salvage radiotherapy (n = 16) delivered after PSA reached 0.5 ng/mL. The primary endpoint was failure of salvage radiotherapy, defined as a PSA value ≥0.2 ng/mL. The log-rank test and Cox proportional hazards model were used for univariate and multivariate analyses, respectively.

Results

During the follow-up period (median: 70 months), four of 20 (20 %), nine of 40 (23 %) and seven of 16 (44 %) patients failed biochemically in the ultra-early, early and delayed salvage radiotherapy groups, respectively. On univariate analyses, the outcome of delayed salvage radiotherapy was worse than the others, while there was no significant difference between ultra-early and early groups. Multivariate analysis demonstrated the presence of Gleason pattern 5, perineural invasion and delayed salvage radiotherapy as independent predictors of poorer survival.

Conclusions

No survival benefit of ultra-early salvage radiotherapy was demonstrated, whereas delayed salvage radiotherapy was associated with worse outcome as reported in previous studies. Our results may support the current recommendations that salvage radiotherapy should be undertaken after two consecutive PSA values ≥0.2 ng/mL and before reaching 0.5 ng/mL.

Role of Hormonal Treatment in Prostate Cancer Patients with Nonmetastatic Disease Recurrence After Local Curative Treatment: A Systematic Review

CONTEXT

The relative benefits and harms of hormonal treatment (HT) versus no or deferred HT in patients with nonmetastatic prostate cancer (PCa) relapse after primary curative therapy are controversial.

OBJECTIVE

To assess the effectiveness of HT for nonmetastatic PCa relapse, prognostic factors for treatment outcome, timing of treatment, and the most effective treatment strategy to provide guidance for clinical practice.

EVIDENCE ACQUISITION

A systematic literature search was undertaken incorporating Medline, Embase, and the Cochrane Library (search ended March 2015). Studies were critically appraised for risk of bias. The outcomes included overall and cancer-specific survival, metastasis-free survival, symptom-free survival, progression to castrate resistance, adverse events, and quality of life.

EVIDENCE SYNTHESIS

Of 9687 articles identified, 27 studies were eligible for inclusion (2 RCTs, 8 nonrandomised comparative studies, and 17 case series). The results suggest that only a subgroup of patients, especially those with high-risk disease, may benefit from early HT. The main predictors for unfavourable outcomes were shorter PSA doubling time (<6-12 mo) and higher Gleason score (>7). Early HT may be warranted for patients with high-risk disease. An intermittent HT strategy appears feasible. Most studies had a moderate to high risks of bias.

CONCLUSIONS

HT for PCa relapse after primary therapy with curative intent should be reserved for patients at highest risk of progression and with a long life expectancy. The potential benefits of starting HT should be judiciously balanced against the associated harms.

PATIENT SUMMARY

This article summarises the evidence on the benefits and harms of hormonal treatment in prostate cancer (PCa) patients in whom the disease has recurred following earlier curative treatment. We found that only a select group of patients with aggressive PCa and a fast rising prostate-specific antigen may benefit from early hormonal treatment (HT), whereas in others HT may be more harmful than beneficial.