Outcomes of Cytoreductive Radical Prostatectomy for Oligometastatic Prostate Cancer on Prostate-specific Membrane Antigen Positron Emission Tomography: Results of a Multicenter European Study.

BACKGROUND: De novo oligometastatic prostate cancer (omPCa) on prostate-specific membrane antigen (PSMA) positron emission tomography (PET) is a new disease entity and its optimal management remains unknown. OBJECTIVE: To analyze the outcomes of patients treated with cytoreductive radical prostatectomy (cRP) for omPCa on PSMA-PET. DESIGN, SETTING, AND PARTICIPANTS: Overall, 116 patients treated with cRP at 13 European centers were identified. Oligometastatic PCa was defined as miM1a and/or miM1b with five or fewer osseous metastases and/or miM1c with three or fewer lung lesions on PSMA-PET. INTERVENTION: Cytoreductive radical prostatectomy. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS: Thirty-day complications according to Clavien-Dindo, continence rates, time to castration-resistant PCa (CRPC), and overall survival (OS) were analyzed. RESULTS AND LIMITATIONS: Overall, 95 (82%) patients had miM1b, 18 (16%) miM1a, and three (2.6%) miM1c omPCa. The median prebiopsy prostate-specific antigen was 14 ng/ml, and 102 (88%) men had biopsy grade group ≥3 PCa. The median number of metastases on PSMA-PET was 2; 38 (33%), 29 (25%), and 49 (42%) patients had one, two, and three or more distant positive lesions. A total of 70 (60%) men received neoadjuvant systemic therapy, and 37 (32%) underwent metastasis-directed therapy. Any and Clavien-Dindo grade ≥3 complications occurred in 36 (31%) and six (5%) patients, respectively. At a median follow-up of 27 mo, 19 (16%) patients developed CRPC and eight (7%) patients died. The 1-yr urinary continence rate was 82%. The 2-yr CRPC-free survival and OS were 85.8% (95% confidence interval [CI] 78.5-93.7%) and 98.9% (95% CI 96.8-100%), respectively. The limitations include retrospective design and short-term follow-up. CONCLUSIONS: Cytoreductive radical prostatectomy is a safe and feasible treatment option in patients with de novo omPCa on PSMA-PET. Despite overall favorable oncologic outcomes, some of these patients have a non-negligible risk of early progression and thus should be considered for multimodal therapy. PATIENT SUMMARY: We found that patients treated at expert centers with surgery for prostate cancer, with a limited number of metastases detected using novel molecular imaging, have favorable short-term survival, functional results, and acceptable rates of complications.

The role of cytoreductive radical prostatectomy and lymph node dissection in bone-metastatic prostate cancer: A population-based study.

BACKGROUNDS: The role of cytoreductive radical prostatectomy (cRP) for bone-metastatic prostate cancer (bmPCa) remains controversial. We aimed to figure out whether cRP and lymph node dissection (LND) can benefit bmPCa. METHODS: 11,271 PCa patients with bone metastatic burden from 2010 to 2019 were identified using SEER-Medicare. Overall survival (OS) and cancer-specific survival (CSS) rates were visualized using Kaplan-Meier plots. Multivariable Cox regression analyses were constructed to examine the effects of cRP and LND on survival, after stratifying to age, prostate specific antigen (PSA), clinical stages, Gleason score, metastatic burden, radiotherapy, and chemotherapy status. RESULTS: 317 PCa patients underwent cRP and cRP was increasingly performed for bmPCa from 2010 (2.2%) to 2019 (3.0%) (p < 0.05). In multi analyses, cRP was predisposed to a better OS or CSS in patients with age < 75, PSA < 98 ng/mL, bone-only metastatic sites or patients not receiving chemotherapy (all p < 0.05). For the patients undergoing cRP, LND especially extended LND was associated with a better OS or CSS (all p < 0.05). CONCLUSIONS: cRP might benefit OS or CSS in young patients with low PSA and bone-only metastatic sites not receiving chemotherapy. And a clear OS or CSS benefit of LND especially extended LND was observed in patients undergoing cRP.

Cytoreductive radical prostatectomy versus no local treatment in patients with metastatic prostate cancer.

Introduction: Prostate cancer is one of the most frequent cancers in Chile, with 8157 new cases in 2020. Worldwide, 5 to 10% of men have metastatic disease at diagnosis, and androgen deprivation therapy with or without chemotherapy is the standard of care for these patients. The use of local treatment in this setting has no formal recommendation due to the lack of high-quality evidence. Some retrospective studies have sought to elucidate the benefit of surgery on the primary tumor in the setting of metastatic disease since it has been proven to be an effective local treatment for other metastatic malignant diseases. Despite these efforts, the benefit of cytoreductive radical prostatectomy as local treatment in these patients remains unclear. Methods: We searched Epistemonikos, the largest database of systematic reviews in health, which is maintained by screening multiple information sources, including MEDLINE, EMBASE, and Cochrane, among others. We extracted data from systematic reviews, reanalyzed data from primary studies, conducted a meta-analysis, and generated a summary results table using the GRADE approach. Results and conclusions: We identified 12 systematic reviews, including seven studies in total, none of which was a trial. Only six of those seven primary studies were used in the results summary. Despite the lack of high-quality evidence, the results summary shows the benefits of performing surgery on the primary tumor in terms of all-cause mortality, cancer-specific mortality, and disease progression. There was also a potential benefit in local complications related to the progression of the primary tumor, supporting the implementation of this intervention in patients with metastatic disease. The absence of formal recommendations highlights the need to evaluate the benefits of surgery on a case-by-case basis, presenting the available evidence to patients for a shared decision-making process and considering future local complications that could be difficult to manage.

Perioperative change of circulating tumor cells in cytoreductive radical prostatectomy for oligometastatic hormone-sensitive prostate cancer: the preliminary safety evidence from long-term oncologic outcomes.

Surgical manipulation has a risk of triggering the shedding of circulating tumor cells (CTCs) in patients with malignancies, However, perioperative change of circulating tumor cells in cytoreductive radical prostatectomy (CRP) for patients with oligometastatic hormone-sensitive prostate cancer (omHSPC) has not yet been well documented. This study aimed to assess whether CRP is a safe procedure for patients with omHSPC by monitoring the perioperative change of CTCs and investigating its impact on long-term oncologic outcomes. We have observed a significant decrease between the median CTC counts before and after surgery (6 vs. 4, p = 0.026). Comparing preoperative and postoperative CTC levels, seven patients increased (CTC increase group), one did not change and nineteen decreased (CTC non-increase group). PSA response rates in CTC increase group were lower than those in CTC non-increase group (73.0% vs 99.8%, p = 0.162), and nadir PSA was higher in CTC increase group (0.043 vs 0.003, p = 0.072). The CTC increase was positively correlated with the nadir PSA (r = 0.386, p = 0.047). The median follow-up period was 71.6 months, we found that there was no significant difference in clinical-pathological, operative variables or long-term oncologic outcomes between perioperative CTC increase and non-increase groups. In the entire cohort, the CTC level significantly decreased after surgery. There was no significant differences in long-term oncologic outcomes between the CTC increase and non-increase groups, implying that CRP potentially represents a safe procedure for the treatment of patients with omHSPC. The results need to be confirmed in a prospective large-scale clinical trial.

Prostatectomía radical citorreductora comparado a no realizar tratamiento local en pacientes con cáncer de próstata metastásico / Cytoreductive radical prostatectomy versus no local treatment in patients with metastatic prostate cancer

Introducción El cáncer de próstata es uno de los cánceres más frecuentes en Chile, con 8157 nuevos casos en 2020. A nivel mundial, 5 a 10% de los hombres presentan metástasis al diagnóstico, y la terapia de deprivación androgénica con o sin quimioterapia es el estándar de cuidado para estos pacientes. El uso de tratamiento local en este contexto tiene una recomendación formal debido a la falta de evi-dencia de alta calidad. Algunos estudios retrospectivos han intentado dilucidar el beneficio de la cirugía sobre el tumor primario en el contexto de la enfermedad metastásica, ya que se ha demostrado que es un tratamiento local eficaz para otras neoplasias metastá-sicas. A pesar de estos esfuerzos, el beneficio de la prostatectomía radical citorreductora como tratamiento local en estos pacientes sigue sin estar claro. Métodos Se realizó una búsqueda en Epistemonikos, la mayor base de datos de revisiones sistemáticas en salud, que se mantiene mediante el cribado de múltiples fuentes de información, incluyendo MEDLINE, EMBASE y Cochrane, entre otras. Se extrajeron los datos de las revisiones sistemáticas, se volvieron a analizar los datos de los estudios primarios, se realizó un metanálisis y se generó una tabla de resumen de resultados utilizando el enfoque GRADE. Resultados y conclusiones Se identificaron 12 revisiones sistemáticas, que incluían siete estudios primarios en total, ninguno de los cuales era un ensayo alea-torizado controlado. Sólo seis de esos siete estudios primarios se utilizaron en el resumen de resultados. A pesar de la falta de evi-dencia de alta calidad, los resultados de este resumen muestran los beneficios de realizar la cirugía en el tumor primario en términos de mortalidad por cualquier causas, mortalidad específica por cáncer y progresión de la enfermedad. También se observó un bene-ficio potencial en las complicaciones locales relacionadas con la progresión del tumor primario, lo que apoya la realización de esta intervención en pacientes con enfermedad metastásica. La ausencia de recomendaciones formales subraya la necesidad de evaluar los beneficios de la cirugía caso por caso, presentando la evidencia disponibles a los pacientes para un proceso de toma de decisiones compartido, teniendo en cuenta las futuras complicaciones locales que podrían ser difíciles de manejar.

Introduction Prostate cancer is one of the most frequent cancers in Chile, with 8157 new cases in 2020. Worldwide, 5 to 10% of men have metastatic disease at diagnosis, and androgen deprivation therapy with or without chemotherapy is the standard of care for these patients. The use of local treatment in this setting has no formal recommendation due to the lack of high- quality evidence. Some retrospective studies have sought to elucidate the benefit of surgery on the primary tumor in the setting of metastatic disease since it has been proven to be an effective local treatment for other metastatic malignant diseases. Despite these efforts, the benefit of cytoreductive radical prostatectomy as local treatment in these patients remains unclear. Methods We searched Epistemonikos, the largest database of systematic reviews in health, which is main-tained by screening multiple information sources, including MEDLINE, EMBASE, and Cochrane, among others. We extracted data from systematic reviews, reanalyzed data from primary studies, conducted a meta- analysis, and generated a summary results table using the GRADE approach. Results and conclusions We identified 12 systematic reviews, including seven studies in total, none of which was a trial. Only six of those seven primary studies were used in the results summary. Despite the lack of high- quality evidence, the results summary shows the benefits of performing surgery on the primary tumor in terms of all- cause mortality, cancer- specific mortality, and disease progression. There was also a potential benefit in local complications related to the progression of the prima-ry tumor, supporting the implementation of this intervention in patients with metastatic disease. The absence of formal recommendations highlights the need to evaluate the benefits of surgery on a case- by- case basis, presenting the available evidence to patients for a shared decision- making process and considering future local complications that could be difficult to manage.

The current role of precision surgery in oligometastatic prostate cancer.

Oligometastatic prostate cancer (omPCa) is a novel intermediate disease state characterized by a limited volume of metastatic cells and specific locations. Accurate staging is paramount to unmask oligometastatic disease, as provided by prostate-specific membrane antigen-positron emission tomography. Driven by the results of prospective trials employing conventional and/or modern staging modalities, the treatment landscape of omPCa has rapidly evolved over the last years. Several treatment-related questions comprising the concept of precision strikes are under development. For example, beyond systemic therapy, cohort studies have found that cytoreductive radical prostatectomy (CRP) can confer a survival benefit in select patients with omPCa. More importantly, CRP has been consistently shown to improve long-term local symptoms when the tumor progresses across disease states due to resistance to systemic therapies. Metastasis-directed treatments have also emerged as a promising treatment option due to the visibility of oligometastatic disease and new technologies as well as treatment strategies to target the novel PCa colonies. Whether metastases are present at primary cancer diagnosis or detected upon biochemical recurrence after treatment with curative intent, targeted yet decisive elimination of disseminated tumor cell hotspots is thought to improve survival outcomes. One such strategy is salvage lymph node dissection in oligorecurrent PCa which can alter the natural history of progressive PCa. In this review, we will highlight how refinements in modern staging modalities change the classification and treatment of (oligo-)metastatic PCa. Further, we will also discuss the current role and future directions of precision surgery in omPCa.

Genomic analysis and long-term outcomes of a phase 1 clinical trial on cytoreductive radical prostatectomy.

Purpose: Approximately 7% of patients with newly diagnosed prostate cancer (PCa) in the US will have have metastatic disease. The dogma that there is no role for surgery in this population has been questioned recently. Here we report long-term outcomes of a phase 1 clinical trial on cytoreductive radical prostatectomy. Materials and methods: This is a multicenter phase 1 trial. The major inclusion criterion was biopsy proven N1M0 or NxM1a/b PCa. Primary end point was the Clavien-Dindo-based major complication rate. Secondary outcomes were biochemical progression and overall survival. RNA-seq correlative study was conducted in nine select cases as a pilot study. Results: Final accrual was 32 patients of which 25 and 7 were cNxM1 and cN1M0, respectively. With the median follow-up of 46 months (interquartile range 31.7 - 52.7 months), 25 out of the 32 patients (75%) were alive at the time of last contact. There were three disparate groups based on the oncologic outcome: favorable, intermediate, and poor. In seven men with favorable response, androgen deprivation therapy was switched to intermittent approach and five remain free of any evidence of disease after more than two years off all systemic therapy with the normalization of serum testosterone. Of these five patients, three had M1 disease. Long-term use of one pad or less per day was 80%. RNA-seq analysis revealed an enriched downregulation of tumor necrosis factor (TNF)-α signature in the favorable group. Conclusion: Overall long-term oncologic outcome of cytoreductive radical prostatectomy was significantly higher than historical results. Importantly, the combination of surgery with systemic therapy may result in a long durable response in a minority of men who present with metastatic PCa.

Cytoreductive radical prostatectomy after chemohormonal therapy in patients with primary metastatic prostate cancer.

OBJECTIVE: Cytoreductive radical prostatectomy (cRP) has been proposed as local treatment option in metastatic hormone-sensitive prostate cancer (mHSPC) to prevent local complications and potentially improve oncological outcomes. In this study, we examined the feasibility of a multimodal concept with primary chemohormonal therapy followed by cRP and analyzed prostate size reduction under systemic treatment, postoperative complication rates, as well as early postoperative continence. METHODS: In this retrospective study, 38 patients with mHSPC underwent cRP after primary chemohormonal therapy (3-monthly luteinising hormone-releasing hormone-analogue + six cycles 3-weekly docetaxel 75 mg/m2) at two centers between September 2015 and December 2018. RESULTS: Overall, 10 (26%) patients had high volume and 28 (74%) patients had low volume disease at diagnosis, according to CHAARTED definition. Median prostate-specific antigen (PSA) decreased from 65 ng/mL (interquartile range [IQR] 35.0-124.5 ng/mL) pre-chemotherapy to 1 ng/mL (IQR 0.3-1.7 ng/mL) post-chemotherapy. Prostate gland volume was significantly reduced by a median of 50% (IQR 29%-56%) under chemohormonal therapy (p = 0.003). Postoperative histopathology showed seminal vesicle invasion in 33 (87%) patients and negative surgical margins in 17 (45%) patients. Severe complications (Grade 3 according to Clavien-Dindo) were observed in 4 (11%) patients within 30 days. Continence was reached in 87% of patients after 1 month and in 92% of patients after 6 months. Median time to castration-resistance from begin of chemohormonal therapy was 41.1 months and from cRP was 35.9 months. Postoperative PSA-nadir ≤1 ng/mL versus >1 ng/mL was a significant predictor of time to castration-resistance after cRP (median not reached versus 5.3 months; p<0.0001). CONCLUSION: We observed a reduction of prostate volume under chemohormonal therapy going along with a low postoperative complication and high early continence rate. However, the oncologic benefit from cRP is still under evaluation.

Cytoreductive radical prostatectomy versus systemic therapy and radiation therapy in metastatic prostate cancer: A systematic review and meta-analysis.

Cytoreductive prostatectomy had gained a lot of interest in treatment of metastatic prostate cancer (mPCa) but this treatment approach is still in the experimental phase. This systematic review and meta-analysis was conducted to shed light on the merits of cytoreductive radical prostatectomy compared to systemic and radiation therapy in treatment of mPCa. In February 2021, summary data from 12 original research papers covering 100,973 patients is abstracted. PubMed/Medline, Scopus, Google Scholar, EMBASE, and the Cochrane Library were all reviewed and 12 publications were chosen for inclusion. The evaluated outcomes were 1-, 3-, and 5-year Cancer-Specific (CSS) and overall survival (OS) rates. Cytoreductive radical prostatectomy had significantly higher survival rate for 1-year (OR: 3.03; 95% CI: 2.30-3.98; p < 0.001), 3-year (OR: 2.47; 95% CI: 2.14-3.51; p < 0.001), and 5-year CSS rates (OR: 2.90; 95% CI: 2.10-4.01; p < 0.001) than systemic therapy in mPCa. Higher significant rates of 1-year (OR: 2.35; 95% CI: 1.65-3.36; p < 0.001), three-year (OR: 2.25; 95% CI: 1.96-2.60; p < 0.001), and 5-year OS rates (OR: 2.54; 95% CI: 2.10-3.08; p < 0.001) were also detected for cytoreductive radical prostatectomy compared to systemic therapy. There were no significant differences in 1-year (OR: 1.21; 95% CI: 0.88-1.66; p = 0.25), 3-year (OR: 1.21; 95% CI: 0.92-1.59; p = 0.18), and 5-year CSS rates (OR: 0.91; 95% CI: 0.58-1.42; p = 0.67) between cytoreductive radical prostatectomy and radiation in mPCa patients. Also, no significant differences in 1-year (OR: 1.06; 95% CI: 0.77-1.47; p = 0.71), 3-year (OR: 0.83; 95% CI: 0.60-1.14; p = 0.25), and 5-year OS rates (OR: 1.84; 95% CI: 0.76-4.45; p = 0.18) were detected between cytoreductive radical prostatectomy and radiation therapy. Cytoreductive radical prostatectomy had significantly higher 1-, 3-, and 5-year CSS and OS rates compared to systemic therapy. Comparable CSS and OS rates were found between cytoreductive radical prostatectomy and radiation therapy.

Oligometastatic prostate cancer: definition and the role of local and systemic therapy: a narrative review.

The definition of oligometastatic prostate cancer (OMPC) includes a heterogenous group of disease states, mostly defined by the number and site of metastases, which seems to be biologically different to widespread tumors. Evidence suggests a substantial survival benefit for this subgroup of limited metastatic burden which is currently seen as a potentially curable disease and therefore with an increasing interest in the scientific community. As there is still no consensus on the definition of OMPC, commonly used criteria are based on the CHAARTED and LATITUDE trials. The management algorithms for these patients were rapidly changing in the past decade due to recent data with a paradigm shift to a multimodal intensification of the treatment by the availability of combinations of hormonal therapy with taxane-based chemotherapy and androgen-receptor-targeted agents leading to significant improvement of clinical outcomes. In addition, radiotherapy of the primary tumor is associated with significant survival benefit in patients with OMPC establishing a new arm in the multimodal treatment concept. Recent data on metastases directed therapy and cytoreductive prostatectomy showed promising results, while there is still a lack of prospective trials and therefore should be limited to experimental settings. The purpose of this review is to summarize and discuss the existing data on treatment of OMPC.

Our experience with cytoreductive radical prostatectomy in patients with oligometastatic prostate cancer / Cytoreductiv radikális prostatectomiával szerzett tapasztalataink oligometastaticus prosztatadaganatok esetében.

Összefoglaló. Bevezetés: Az utóbbi években az oligometastaticus prosztatadaganatok kezelése során a szisztémás kezelés mellett egyre gyakrabban végzik a primer tumor lokális kezelését is. Célkituzés: A szerzok a tanulmányban a cytoreductiv radikális prostatectomia szerepét vizsgálták az oligometastaticus prosztatadaganatok kezelése során. Módszer: 2012. 01. 01. és 2019. 01. 01. között összesen hét betegben végeztek cytoreductiv radikális prostatectomiát oligometastaticus prosztatadaganat esetében. A betegek átlagos életkora 64 év, az átlagos PSA-koncentráció 43 ng/ml volt. Az áttétek száma minden beteg vonatkozásában maximum három volt, és valamennyi esetben csontáttét volt jelen. A betegek androgéndeprivatiós hormonkezelést kaptak, és közülük négy esetben már a mutét elott elkezdték a hormonterápiát. Négy betegnél a csontmetastasisok miatt az áttétek sugárkezelése is megtörtént. Eredmények: A cytoreductiv prostatectomia szövettana öt esetben igazolt lokálisan elorehaladott (pT3) daganatot, és két alkalommal marginpozitivitás volt jelen. Emiatt öt beteg kapott adjuváns lokális irradiációt a metastasisok besugárzásán kívül. A mutétet követoen biokémiai progresszió egy esetben jelentkezett. Ennek oka lokális recidíva volt, mely miatt a beteg 'salvage' irradiációt kapott. Az átlagosan 38 hónapos utánkövetés során új metastasist nem diagnosztizáltak, és tumor okozta halálozás nem fordult elo. Következtetés: A cytoreductiv prostatectomia oligometastaticus prosztatarákos betegek kezelésében - válogatott beteganyagon - megvalósítható lehetoség. Ugyanakkor a cytoreductiv prostatectomia elonyei a tumorprogresszió szempontjából még nem egyértelmuek, ennek eldöntéséhez további vizsgálatok szükségesek. Orv Hetil. 2021; 162(13): 483-487. INTRODUCTION: In recent years, in addition to systemic therapy, local treatment of primary tumor has become increasingly common in the treatment of oligometastatic prostate cancers. Objectve: The authors measured the role of cytoreductive radical prostatectomy in the treatment of oligometastatic prostate carcinoma. METHODS: From Janury 2012 to January 2019, they performed cytoreductive radical prostatectomy in seven patients with oligometastatic prostate cancer. The mean age of the patients was 64 years, and the mean PSA value was 43 ng/ml. The patients had maximum three distant metastases and all metastases were localized to the bones. The patients received androgene deprivation therapy and this treatment was started before the surgery in four cases. Irradiation of the bone metastasis was performed in four cases. RESULTS: The histology of the cytoreductive radical prostatectomy showed locally advanced tumor (pT3) in five patients and margin-positive status was present in two cases. Hence, adjuvant irradiation was administered locally in five patients in addition to the irradiation of bone metastases. Biochemical progression was detected in one patient during the follow-up period. It was caused by local recurrence of the tumor and the patient was treated with salvage irradiation. During the 38 months follow-up period neither new distant metastasis nor cancer-related mortality was detected. CONCLUSION: The cytoreductive radical prostatectomy is a feasible option in selected cases with oligometastatic prostate cancer. However, the benefits of cytoreductive radical prostatectomy regarding tumor progression are not clear yet and further studies are required. Orv Hetil. 2021; 162(13): 483-487.

Enumeration and Changes in Circulating Tumor Cells and Their Prognostic Value in Patients Undergoing Cytoreductive Radical Prostatectomy for Oligometastatic Prostate Cancer-Translational Research Results from the Prospective ProMPT trial.

BACKGROUND: The prognostic value of circulating tumor cells (CTCs) in patients with hormone-naïve oligometastatic prostate cancer (HNoMPC) undergoing cytoreductive radical prostatectomy (CRP) is unknown. OBJECTIVE: To determine the pre- and postoperative prognostic value of CTC enumeration in patients undergoing CRP. DESIGN, SETTING, AND PARTICIPANTS: Thirty-three patients with HNoMPC from the prospective, single-arm ProMPT trial who underwent CRP between 2014 and 2015 at the Martini-Klinik were evaluated. Follow-up visits for all patients were conducted every 6 mo up to 36 mo after CRP and included serial detection of CTCs in 7.5 ml blood samples using the CellSearch system. INTERVENTION: CRP. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS: CTC enumerations before and after CRP, and their prognostic value on metastatic castration-resistant prostate cancer-free survival and overall survival (OS) were analyzed using Kaplan-Meier plots and univariable Cox-regression analysis. RESULTS AND LIMITATIONS: Sixteen patients (48.5%) had positive CTCs prior to CRP. A CTC count of ≥2 before or 6 mo after CRP was a prognostic factor for worse oncologic outcome. Compared with other biomarkers (prostate-specific antigen, lactate dehydrogenase, and bone-specific alkaline phosphatase), the prognostic value of CTCs was highest using Harrell's C for OS (0.69), while the highest C-index could be achieved for a combination of conventional markers and CTC count (0.74). After progression to metastatic castration-resistant prostate cancer, CTC enumeration of ≥5 was prognostic for OS. The main limitation is the small sample size. CONCLUSIONS: CTC enumeration contributes to prognostic information, which might help select HNoMPC patients who might benefit most from CRP. PATIENT SUMMARY: In this report, we looked at the value of circulating tumor cell (CTC) determination in patients undergoing radical prostatectomy for oligometastatic prostate cancer. We could show that the number of CTCs was a prognostic factor at all analyzed time points and was more closely associated with prognosis than other biomarkers commonly used in daily clinical practice.

Cytoreductive prostatectomy in metastatic prostate cancer: current knowledge and future directions.

The current standard of care for patients with metastatic prostate cancer is systemic androgen deprivation therapy, and addressing the primary tumor has been reserved for patients with localized disease. However, emerging data has called into question the universality of this paradigm. Recent studies have found treatment of the primary tumor in patients with metastatic disease not only can provide the patient with symptomatic relief but also may provide a survival benefit. The potential biological and clinical benefit for cytoreductive surgery has been also been suggested in several translational models. Thus, PubMed electronic database was queried for publications on patients with metastatic prostate cancer who underwent cytoreductive prostatectomy, using keywords including: cytoreductive prostatectomy, radical prostatectomy, metastatic prostate cancer. In this review we examine literature regarding feasibility of cytoreductive prostatectomy, oncologic outcomes, and future directions including the ongoing clinical trials in this arena. While the retrospective data is encouraging, results of these ongoing prospective trials are needed before this option is offered to patients as a reasonably safe treatment with demonstrated benefits to survival and quality of life.

Role of surgery in oligometastatic prostate cancer.

Androgen deprivation therapy as single modality therapy was the standard management for oligometastatic prostate cancer (PCa). Current paradigm shifts toward a multimodality therapy approach, targeting all sites of disease, including treatment of the primary in the form of radical prostatectomy or radiation therapy. The objective of this article was to reveiw the literature regarding the role of surgery in oligometastatic PCa. PubMed and MEDLINE electronic databases were queried for English language articles from January 1, 1980 to March 31, 2019. Keywords use included oligometastatic PCa, metastatic prostate cancer (mPCa), radical prostatectomy, and cytoreductive prostatectomy. Preclinical, prospective, and retrospective studies were included. There is no published randomized controlled trials, evaluating the role of surgery in mPCa. Preclinical and retrospective data suggest benefit of primary tumor treatment in mPCa. Current literature supports the concept of cytoreductive surgery as it can prevent late symptomatic local progression, has acceptable complications, and may prolong survival in patients with mPCa. Surgery is a feasible procedure in mPCa which may improve outcome in mPCa. However, there is no Level 1 evidence, yet that support the role of surgery in mPCa. The results from well-organized prospective, randomized controlled trials are awaited before performing radical prostatectomy for mPCa in clinical practice.

Local treatment for metastatic prostate cancer: A systematic review.

The potential oncological benefit for radical treatment in the setting of oligometastatic prostate cancer has been under investigation and is frequently discussed. We carried out a systematic review of English language articles using the Medline database (January 2000 to May 2017) to identify studies reporting local treatment in men with metastatic prostate cancer at diagnosis. Primary end-points were oncological outcomes, such as cancer-specific and overall mortality. Secondary end-points were non-oncological outcomes, such as complications, operating room time, blood loss or length of hospital stay. Two independent authors reviewed and extracted all search results. Overall, 18 studies reporting on local treatment in metastatic prostate cancer patients were identified (14 original articles, three brief correspondences and one letter to the editor). All of them were retrospective; one partly included prospective data. All studies addressed oncological outcomes, 16 compared local treatment with no-local treatment and 14 adjusted for confounders using multivariable regression models. All but one study concluded a survival benefit for local treatment in the metastatic setting. Due to heterogeneity of available data, a representative meta-analysis could not be carried out. Five studies reported non-oncological outcomes. Although local treatment in metastatic prostate cancer appears to be feasible, its oncological effect remains unclear due to high susceptibility of available studies to significant selection bias.

Does Cytoreductive Prostatectomy Really Have an Impact on Prognosis in Prostate Cancer Patients with Low-volume Bone Metastasis? Results from a Prospective Case-Control Study.

The impact of cytoreductive radical prostatectomy (CRP) on oncological outcomes in patients with prostate cancer (PCa) and distant metastases has been demonstrated by retrospective data with their potential selection bias. Using prospective institutional data, we compared the outcomes between 43 PCa patients with low-volume bone metastases (1-3 lesions) undergoing CRP (median follow-up 32.7 mo) and 40 patients receiving best systemic therapy (BST; median follow-up 82.2 mo). The inclusion criteria for both cohorts were identical. So far, no significant difference in castration resistant-free survival (p=0.92) or overall survival (p=0.25) has been detected. Compared to recent reports, the outcomes for our control group are more favorable, indicating a potential selection bias in the previous retrospective studies. Therefore, the unclear oncological effect has to be weighed against the potential risks of CRP. However, patients benefit from a significant reduction in locoregional complications (7.0% vs 35%; p<0.01) when undergoing CRP. PATIENT SUMMARY: In this study we analyzed the impact of surgery in patients with prostate cancer and bone metastases. Using prospective data, we could not show a significant benefit of surgery on survival, but the rate of locoregional complications was lower. Therefore, patients should be treated within prospective trials evaluating the role of cytoreductive prostatectomy in low-volume, bone metastatic prostate cancer.

Role of radical prostatectomy in metastatic prostate cancer: A review.

CONTEXT: Recent demonstration of efficacy with the use of chemohormonal therapy for men with metastatic prostate cancer (mPCa) has expanded the therapeutic options for these patients. Furthermore, multimodal therapy to treat systemic disease in the context of locoregional control has gained increasing interest. Concomitantly, the role of radical prostatectomy (RP) in multimodal treatment for locally advanced prostate cancer is expanding. As a result, there is interest in investigating the potential benefit of cytoreductive RP in mPCa. OBJECTIVE: To review the literature regarding the role of cytoreductive prostatectomy in the setting of mPCa. EVIDENCE ACQUISITION: MEDLINE and PubMed electronic databases were queried for English language articles related to patients with mPCa who underwent RP from January 1990 to June 2016. Key words used in our search included cytoreductive prostatectomy, radical prostatectomy, and metastatic prostate cancer. Preclinical, retrospective, and prospective studies were included. EVIDENCE SYNTHESIS: There are no published randomized control trials examining the role of cytoreduction in mPCa. Local symptoms are high in mPCa and often provide a necessity for palliative procedures with the impact on oncologic outcomes being uncertain. Recently, preclinical and retrospective population-based data suggest a benefit from treatment of the primary tumor in metastatic disease. Potential mechanisms mediating this benefit include prevention of symptomatic local progression and modulation of disease biology, resulting in an improvement in progression-free and overall survival. Current literature supports the feasibility of cytoreductive prostatectomy as it is associated with acceptable side effects that are comparable to RP for high-risk localized disease. In aggregate, these data compel prospective evaluation of the hypothesis that cytoreductive prostatectomy improves the outcome of men with mPCa. CONCLUSIONS: Cytoreductive prostatectomy in mPCa is a feasible procedure that may improve outcomes for men when combined with multimodal management. Preclinical, translational, and retrospective evidence supports local therapy for metastatic disease. However, currently, evidence is limited and is subject to bias. The results of ongoing prospective randomized trials are required before incorporating this therapeutic strategy into clinical practice.