Preoperative Prostate-specific Antigen Value Research Articles

Study of prostate-specific antigen levels during salvage radiotherapy after prostate cancer surgery

BackgroundAdministration of adjuvant or salvage radiotherapy (RT) after prostate cancer (PCa) surgery is supported by clinical evidence and is a widely adopted strategy. On occasion, we detect changes in prostate-specific antigen (PSA) levels, such as a transient elevation or decline, during RT. Thus, we retrospectively investigated the frequency of changes in PSA levels, their associations with histopathological parameters, PSA doubling time (PSADT), and biochemical recurrence (BR) of PCa.MethodsThis study included 23 consecutive patients who underwent surgery for PCa between 2012 and 2019, received salvage RT without hormone therapy, and exhibited changes in PSA levels during RT. The prostatic bed was irradiated with a total dose of 64 to 66 Gy. BR was defined as consecutive PSA levels exceeding 0.2 ng/mL or having to start hormone therapy because of PSA elevation after salvage RT.ResultsDuring salvage RT after PCa surgery, PSA levels transiently increased in 11 patients (47.8%) and decreased in 12 (52.2%). When factors associated with BR were examined in patients with transient PSA elevation, seminal vesicle invasion and preoperative PSA values were identified as being statistically significant. When factors for BR were examined in patients with a decline in PSA levels, the Gleason score and PSADT were identified as being significant. Among the cases of a decline in PSA levels during salvage RT, those who received a radiation dose of less than 36 Gy did not experience BR. Similarly, patients who exhibited changes in PSA levels during salvage RT and did not have perineural invasion did not experience BR.ConclusionThis is the first study to examine the histopathological factors possibly affecting BR in patients undergoing salvage RT after PCa surgery. The results indicate that in patients with transient PSA elevation, seminal vesicle invasion is a significant risk factor. On the other hand, in patients with a decline in PSA levels during irradiation, the Gleason score and perineural invasion were found to be potential risk factors for BR. These findings suggest that a thorough examination of postoperative histopathological results may be necessary for the optimal management of patients with PCa.

Unilateral Pelvic Lymph Node Dissection in Prostate Cancer Patients Diagnosed in the Era of Magnetic Resonance Imaging-targeted Biopsy: A Study That Challenges the Dogma.

Bilateral extended pelvic lymph node dissection at the time of radical prostatectomy is the current standard of care if pelvic lymph node dissection is indicated; often, however, pelvic lymph node dissection is performed in pN0 disease. With the more accurate staging achieved with magnetic resonance imaging-targeted biopsies for prostate cancer diagnosis, the indication for bilateral extended pelvic lymph node dissection may be revised. We aimed to assess the feasibility of unilateral extended pelvic lymph node dissection in the era of modern prostate cancer imaging. We analyzed a multi-institutional data set of men with cN0 disease diagnosed by magnetic resonance imaging-targeted biopsy who underwent prostatectomy and bilateral extended pelvic lymph node dissection. The outcome of the study was lymph node invasion contralateral to the prostatic lobe with worse disease features, ie, dominant lobe. Logistic regression to predict lymph node invasion contralateral to the dominant lobe was generated and internally validated. Overall, data from 2,253 patients were considered. Lymph node invasion was documented in 302 (13%) patients; 83 (4%) patients had lymph node invasion contralateral to the dominant prostatic lobe. A model including prostate-specific antigen, maximum diameter of the index lesion, seminal vesicle invasion on magnetic resonance imaging, International Society of Urological Pathology grade in the nondominant side, and percentage of positive cores in the nondominant side achieved an area under the curve of 84% after internal validation. With a cutoff of contralateral lymph node invasion of 1%, 602 (27%) contralateral pelvic lymph node dissections would be omitted with only 1 (1.2%) lymph node invasion missed. Pelvic lymph node dissection could be omitted contralateral to the prostate lobe with worse disease features in selected patients. We propose a model that can help avoid contralateral pelvic lymph node dissection in almost one-third of cases.

Chronic kidney disease, preoperative use of antispasmodics and lower resected prostate volume ratios are risk factors for postoperative use of adrenergic Alpha-blockers and antispasmodics.

Transurethral resection of prostate (TURP) and laser prostate surgery are common surgeries for benign prostate hyperplasia (BPH). We conducted an investigation using hospital database to evaluate the clinical factors associated with post-operative usage of alpha-blockers and antispasmodics. This study was conducted using retrospective clinical data from the hospital database, which contained newly diagnosed BPH patients between January 2007 and December 2012 who subsequently received prostate surgery. The study end-point was the use of alpha-blockers or antispasmodics for at least 3 months duration after 1 month of surgery. The exclusion criteria was prostate cancer diagnosed before or after the surgery, recent transurethral surgeries, history of open prostatectomy, and history of spinal cord injury. Clinical parameters, including age, body mass index, preoperative prostate specific antigen value, comorbidities, preoperative usage of alpha-blockers, anstispasmodics and 5-alpha reductase inhibitors, surgical methods, resected prostate volume ratios, and preoperative urine flow test results, were evaluated. A total of 250 patients receiving prostate surgery in the database and confirmed pathologically benign were included. There was significant association between chronic kidney disease (CKD) and the usage of alpha-blockers after prostate surgery (OR = 1.93, 95% CI 1.04-3.56, p = 0.036). Postoperative antispasmodics usage was significantly associated with preoperative usage of antispasmodics (OR = 2.33, 95% CI 1.02-5.36, p = 0.046) and resected prostate volume ratio (OR = 0.12, 95% CI 0.02-0.63, p = 0.013). BPH patients with underlying CKD were more likely to require alpha-blockers after surgery. In the meantime, BPH patients who required antispasmodics before surgery and who received lower prostate volume resection ratio were more liable to antispasmodics after prostate surgery.

Risk of biochemical recurrence in patients with a positive surgical margin after radical prostatectomy.

Serum prostate specific antigen (PSA) is an irreplaceable marker in the detection and follow-up of patients with prostate cancer. In our analysis we addressed factors that could indicate the likelihood of biochemical recurrence (BCR) early after radical prostatectomy. We mainly focused on the positive surgical margin (R1). Retrospective evaluation and analysis of the database of patients with prostate cancer after radical prostatectomy from 2001 to 2019. In total 1529 patients were enrolled in the study. The median follow-up was 48 months. The age of the patients ranged from 49 to 76 years. We used pre-operative PSA values, and the monitoring of the dynamics of 3rd generation PSA progression (detection limit 0.003 ng/ml) at month 1 and month 3 after surgery and then in 3-month intervals. We monitored the surgical margin positivity (R0 negative, R1 positive) and the Gleason score (GS) based on histological samples and we analysed the relationship to biochemical recurrence of the disease. The pre-operative PSA value did not show a direct relationship to the R1 risk. Patient values in the groups R1 and R0 differed only by 1.159 ng/ml (p=NS). The 3rd generation PSA value at month 1 after surgery was 50.82% higher in R1 patients (p>0.001). 50% of patients with R1 (29.5% patients of the total) did develop BCR during the follow-up period, while in patients with R0 (70.5% patients of the total) this proportion was 30% (p>0.001). Among those with GS 67, 47% developed BCR. The GS 810 group relapsed in 75% of the cases (p>0.001). According to our analysis 33% of the patients reached the stage of biochemical recurrence. We demonstrated a direct dependency between the risk of recurrence and the final Gleason score. The presence of R1 should not be viewed as a direct indication for adjuvant radiotherapy.

Benign prostat hiperplazisinin cerrahi tedavisi sonrası tanı konulan insidental prostat kanseri

Objective: Incidental prostate cancer (PCa) is defined as the clinically inapparent tumor detected after transurethral resection of prostate (TURP) or open prostatectomy with benign preoperative rectal examination, prostate specific antigen (PSA) and imaging. The aim of this study is to determine the incidence and clinical significance of incidental prostate cancer in our clinic. Material and Methods: A retrospective analysis was performed in patients who were treated with TURP or transvesical open prostatectomy (TVP) between January 2014 and December 2019. Age, prostate volume, preoperative PSA value, Gleason score, ISUP score, stage and presence of previous prostate biopsy were noted. Treatment performed for incidental PCA was determined. Results: A total of 1020 patients were surgically treated for benign prostate hyperplasia between January 2014 and December 2019. Incidental PCa was diagnosed in 57 (5.6%) patients. 51 (89%) of the patients had TURP and 6 (11%) had TVP. Mean age was 69.9±7.1 years and mean PSA value was 5.3±4.8 ng/ml. Majority of the patients (82.4%) had a Gleason score of 6 (3+3) and 37 (64.9%) patients were reported as stage 1a. Patients with preoperative prostate biopsy have significantly higher prostate volume and PSA values compared to the patients without biopsy (p<0.01). Active surveillance was performed in 42 patients, 2 patients underwent radical prostatectomy, 6 patients had radiotherapy and 7 patients had androgen blockade. Conclusion: We have an incidental PCa rate similar to the literature. Majority of the patients have stage 1a disease and a Gleason score of 6. Most of the patients were managed conservatively. Keywords: incidental prostate cancer, benign prostate hyperplasia, transurethral resection of prostate

A risk grouping algorithm for predicting factors of persistently elevated prostate-specific antigen in patients following robot-assisted radical prostatectomy.

After radical prostatectomy, prostate-specific antigen(PSA) value measuring ≥0.1ng/mL is defined as persistent PSA(pPSA) and in many studies, it was found to be associated with aggressive disease and poor prognosis. Our aim in this study is to point out the pathological and clinical factors affecting pPSA among the patients who underwent robot-assisted radical prostatectomy(RARP) in an experienced academic centre and to make a useful risk grouping algorithm that can predict pPSA value based on operative data. We examined records of 1273 patients who underwent RARP retrospectively. Preoperative, operative and postoperative data were collected. Based on the PSA values (ng/mL) measured after 4-to-8weeks of RARP, patients were divided into two groups as pPSA group (Group1)(n=97) with PSA values ≥0.1ng/mL and undetectable PSA group (Group2)(n=778) with PSA values <0.1ng/mL. Later on, Group1 was further divided into Group1a (PSA:0.1-0.2ng/mL) and Group 1b (PSA≥0.2ng/mL) to evaluate biochemical recurrence(BCR). Multivariate logistic regression analyses of the collected data revealed that preoperative PSA≥20ng/mL, operation time, a postoperative international society of urological pathology (ISUP) grade of ≥4, pT 3-4 and pN were independently associated with pPSA. Based on these results, a risk grouping algorithm predicting pPSA was developed. By looking at the risk grouping algorithm pPSA was found in 98.9% of the cases with a preoperative PSA value of ≥20ng/mL, an operation time of 150min, a postoperative ISUP grade of 4-5, a positive lymphovascular invasion (LVI) status, pT3-T4, and pN+; while pPSA was found in 25.5% of the cases with a preoperative PSA value of <20ng/mL, an operation time of 100min, a postoperative ISUP grade of <4-5, a negative LVI status, pT<3-4 and pN-. The estimated BCR-free survival time was 16.3months in Group 1a and 57.0months in Group2 (P<.001). Adjuvant treatment ratio was 64.9% in Group1 and 7.1% in Group2 (P<.001). For the patients who underwent RARP, factors associated with aggressive disease can predict the PSA persistence. To plan our treatment modalities accurately, an applicable risk grouping algorithm in daily practice would be useful.

Is there a PSA cut-off value indicating incidental prostate cancer in patients undergoing surgery for benign prostatic hyperplasia?

To investigate incidental prostate cancer (IPCa) rate and to determine prostate specific antigen (PSA) cut-off value indicating PCa in patients who underwent surgery by being diagnosed with benign prostatic hyperplasia (BPH) clinically or by standard prostate biopsy. Data of 317 patients, who underwent transurethral resection of the prostate (TURP) or open prostatectomy (OP) with pre-diagnosis of BPH, were evaluated retrospectively. The examined parameters included patients' demographics, preoperative serum PSA values, digital rectal examination (DRE) findings, surgical method, histopathological findings and Gleason Scores. A total of 317 patients were included the study. The median age of patients was 69 years (min: 51-max: 79) and the median PSA value was 3.24 ng/dl (min: 0.17-max: 34.9). In 21 patients (6.6%); DRE findings were in favor of malignancy, but prostate biopsy resulted as BPH. While 281 (88.6%) of the patients underwent TURP, 36 (11.4%) underwent open prostatectomy. PCa was detected in 21 (6.6%) patients. PSA was statistically higher in patients who underwent OP compared to patient who underwent TUR-P, 5.9 (min: 1.2 - max: 27.6, IR: 8.7) vs. 2.8 (min: 0.1-max: 34.9, IR: 4.2) ng/dl, p < .001. The rate of IPCa among four PSA group was similar (p = 0.46). There was no difference between the rate of IPCa in patients younger and older than 70 years, (p = 0.11). Please change whole sentence as 'The median PSA level was slightly higher in patients diagnosed with BPH compared to patients diagnosed with IPCa, 3.2 (min: 0.1-max: 34.9) vs. 2.7 (min: 0.3-max: 26.5) ng/dL, p = 0.9. IPCa still remains an important clinical problem. We were not able to find any correlation of PSA and age with incidental PCa.

The efficiency of prostate-specific antigen density measurement using three different methods on the prediction of biochemical recurrence

Background The aim of this study was to evaluate the efficiency of prostate-specific antigen (PSA) density (PSAD) calculated through prostate volume (PV) obtained via transrectal ultrasound (TRUS) and magnetic resonance imaging (MRI) and actual prostate weight (PW) methods obtained via pathological evaluation on the prediction of biochemical recurrence (BCR) in the follow-ups of patients who had undergone radical prostatectomy (RP). Methods A total of 335 clinically localized prostate cancer (PCa) patients who had received open RP between January 2015 and December 2018 were enrolled in the study. Pre and postoperative demographic data, clinical and pathological findings and BCR conditions were recorded. The PSAD was calculated using information obtained through preoperative TRUS examinations, MRI, and collected pathological specimens after RP by dividing the maximum preoperative PSA value and PV/PW. Results In a mean follow-up duration of 20.2 ± 8.5 months, recurrence was observed in 52 patients (24.4%) and progression was observed in 8 (3.8%) patients. The TRUS-PSAD, MRI-PSAD, and PW-PSAD values were statistically significantly higher in BCR patients compared to non-BCR patients. The International Society of Urologic Pathologists (ISUP) grade 5 and pT3b as a pathological stage were detected as independent variables in the prediction of BCR formation. Actual PW had a high prediction value compared to other PSAD measurements at <40 g prostate weights, but it had a low prediction value in prostates with an actual PW >60 g. Conclusions In this study, it was stated that PSAD acquired through different imaging methods does not affect the usability of PSAD in BCR prediction in clinical practice. The ISUP grade 5 and pT3b stage PCa were detected as independent markers in BCR prediction after RP.

The effect of peritoneal re-approximation on lymphocele formation in transperitoneal robot-assisted radical prostatectomy and extended pelvic lymphadenectomy.

The objective of the study was to evaluate the effect of peritoneal re-approximation at the end of the procedure in transperitoneal robot-assisted radical prostatectomy (tRARP) and extended pelvic lymphadenectomy (ePLND) on operative, oncologic, and symptomatic lymphocele rates. A total of 79 patients were included in the study who underwent tRARP and bilateral ePLND performed by two different experienced surgeons. One of the surgeons performed the peritoneal re-approximation (Group 1, n=41) and the other did not re-approximate the peritoneum (Group 2, n=38) at the end of the procedure in tRARP and ePLND. Operative parameters and symptomatic lymphocele rates were compared between the groups. There were no significant differences between the preoperative parameters age, body mass index, and preoperative prostate-specific antigen values (p>0.05). The perioperative parameters were as follows: the operation time and estimated blood loss (EBL) was less, and the number of removed lymph nodes was higher in Group 2. However, only the difference in the EBL was statistically significant (p=0.03). Hospitalization time, symptomatic lymphocele, intervention requiring lymphocele, and complication rates were found to be less in Group 2, but only hospitalization time was statistically significant (p=0.04). Pathological parameters were similar for both groups. There was a significant correlation between lymph node positivity and the presence of symptomatic lymphocele in the correlation analysis (p=0.05). It has been shown in this study that the re-approximation of the peritoneum does not provide any additional benefit in terms of complications. Considering that this process also increases the operation time and lymphocele formation, we think there is no need for re-approximation after robot-assisted radical prostatectomy and pelvic lymphadenectomy.

Multıparametric Prostate Magnetic Resonance Imaging Before Radical Prostatectomy: Can it Predict Histopathology?

We aimed to investigate the histopathological correlation of the suspected prostate malignancy detected in multiparametric prostate magnetic resonance imaging (mpMRI). The data of 93 patients underwent radical prostatectomy and had preoperative mpMRI were examined. Age and pre-operative Prostate-Specific Antigen value were retrospectively collected from patient files. The pathology specimens were examined again and post-operative ISUP grade group, other pathological findings (seminal vesicle invasion, lymph node involvement and extraprostatic extension), pre-operative mpMRI were re-examined and PIRADS score, extracapsular extension, seminal vesicle invasion, neurovascular bundle invasion, lymph node involvement and ADC values were recorded. 151 (92,07%) of 164 lesions detected in mpMRI were histopathologically correlated. 80% of patients with seminal vesicle invasion (P < 0.001), 28.8% of patients with extracapsular extension (P < 0.052) and 42.9% of patients with lymph node involvement (P = .001) in mpMRI were histopathologically correlated. A significant relationship was found between PIRADS scores and ISUP grade groups (P < 0.001). There was a negative correlation between ADC values and ISUP grade groups (P < 0.001). Our study showed that the lesions detected by mpMRI showed a high histopathological correlation.

Prostate cancer with cribriform pattern: Exclusion criterion for active surveillance?

Following the 2014 International Society of Urological Pathology meeting, a rapidly growing body of evidence by several researchers has been demonstrating a poor prognosis in association with cribriform morphology. The aim of our study was to describe the presence of cribriform foci in specimens of radical prostatectomies and to evaluate whether demographic and clinical characteristics are associated with the presence of cribriform pattern. This cohort study was based on 70 radical retropubic prostatectomies specimens collected between 2012 and 2016 and evaluated for the association of the cribriform pattern with age, prostate-specific antigen at surgery day, Gleason on biopsy, Gleason after radical prostatectomy, extracapsular extension, vesicles invasion, margins, multiparametric magnetic resonance imaging, and post-operative radiotherapy. Results; From the univariable analysis, biochemical prostatespecific antigen recurrence (p = 0.001), extracapsular extension (p = 0.003), pre-operative prostate-specific antigen (p = 0.017), vesicles invasion, (p = 0.038) and post-operative radiotherapy (p < 0.001) showed an association with the presence of cribriform pattern. There was also a significant difference of cribriform pattern and Gleason 7 in needle biopsy (p = 0.020) and cribriform pattern and Gleason 8 or 9 in radical prostatectomy specimen (p = 0.036). In our study, the increase in preoperative prostate-specific antigen had a high association with cribriform pattern. Further evidence is needed to discriminate preoperative prostate specific antigen values that might potentially be associated with the presence of cribriform pattern. Raising our knowledge about the cribriform pattern can be an excellent opportunity to correctly identify and treat patients who will eventually die from prostate cancer, sparing treatment in those who will not.

Association between preoperative prostate-specific antigen levels and mortality in high- and intermediate-grade prostate cancer patients who received radical prostatectomy: Findings from the SEER database.

BackgroundThe degree of expression of prostate-specific antigen (PSA) has been applied for the purpose of screening and monitoring the progression of prostate cancer. The goal of this study was to evaluate the association between preoperative PSA levels and mortality outcomes in men with high- and intermediate-grade prostate cancer who received radical prostatectomy.MethodsThe 2004–2014 files of the Surveillance, Epidemiology, and End Result database were analyzed. A total of 97,357 patients with non-metastatic high- and intermediate-grade adenocarcinoma of the prostate who received radical prostatectomy were identified. Using Kaplan–Meier estimates and multivariable Cox proportional hazard models, the relationship between preoperative PSA values and cancer-specific mortality outcomes in men with high- and intermediate-grade prostate cancer who received radical prostatectomy was tested.ResultsOf 97,357 patients with high- and intermediate-grade prostate cancer who received radical prostatectomy from 2001 to 2014, there were 983 cancer-specific deaths, and the average follow-up time for the cohort was 85.0 (34.6) months. Preoperative PSA values > 10 ng/ml were associated with greater risk of cancer-specific mortality (hazard ratio 2.3, P < 0.0001) when compared to the referent/normal values for preoperative PSA (<4 ng/ml). Individuals with preoperative PSA values 4–10 ng/ml had lower risk of prostate cancer-specific mortality (hazard ratio 0.80, P = 0.03) when compared to individuals with normal preoperative PSA values.ConclusionsIndividuals with preoperative PSA values 4–10 ng/ml had 20% lower risk of prostate cancer-specific mortality when compared to individuals with preoperative PSA values of <4 ng/dl. The findings from this study suggest that low or normal preoperative PSA values may not always mean that prostate cancer is indolent, and more work needs to be done to better classify risk in men with prostate cancer.

Profile of Radiation Therapy after Radical Prostatectomy: Experience in a Tertiary Hospital in Jakarta, Indonesia

Background: Despite the high recurrence rate, radical prostatectomy (RP) remains as a preferable surgical treatment of localized prostate cancer. Adjuvant radiotherapy (ART) and salvage radiotherapy (SRT) are available approaches in preventing biochemical progression after RP. We aim to investigate the use of radiotherapy, both ART and SRT, in those who underwent RP.Methods: We used a retrospective cohort study design, with samples recruited from prostate cancer patients who underwent RP between January 2008 and December 2016. Patients who had undergone RP at Cipto Mangunkusumo Hospital, Jakarta, Indonesia were included in the present study. More in detail, three and five subjects were treated with ART and SRT, respectively. We only included those who had a minimum of one year of follow-up. Variables including age, preoperative prostate-specific antigen (PSA), clinical staging, pathological staging, Gleason score, and death were recorded. We analyzed the overall survival time using the Kaplan-Meier method.Results: From 34 patients included in the study, 26 underwent RP alone, while 5 patients underwent adjuvant radiotherapy and 3 patients underwent salvage radiotherapy after RP. The mean ages in the three groups were 61.46 ± 5.76, 58.2 ± 4.86 and 62.67 ± 7.5, respectively. The preoperative PSA value was above 10 mg/dL in 61.5% in patients without RT, 100% in patients with ART after RP, and none in SRT. 17 (51.5%) out of 33 subjects were ≥T2 clinical stage and 24/30 (80%) subjects were ≥pT2. Timing for ART and SRT ranged from 1.07 to 6.3 and 5.27 to 21.43 months after RP, respectively. The 10-year survival rates were 84.6% in patients with RP alone, 80% in patients with ART+RP, and 66.7% in patients with SRT+RP. The average survivals of those who had RP alone as well as ART and SRT were 44.56 ± 32.64, 46.79 ± 24.02, and 71.71 ± 38.74 months.Conclusions: The average survival of those who received SRT is better than those who underwent ART and RP alone. Prospective studies with larger samples are needed to evaluate the efficacy of radiation therapy after radical prostatectomy.

The application and outcomes of C. R.P.C. four-step radical prostatectomy under extraperitoneal laparoscopy

Objective To summarize the preliminary experience of extraperitoneal laparoscopic radical prostatectomy (C.R.P.C. four-step) for localized prostate cancer and the outcomes based on early follow-up. Methods A total of 102 prostate cancer patients were screened by prostate specific antigen (PSA) and diagnosed by prostate magnetic resonance imaging and prostatic puncture biopsy with cT1c-cT3b, with average age of (67±5) years old, average preoperative total PSA value of (45.32±18.33) ng/ml, and average prostate volume was (42±12)cm3. All these patients underwent extraperitoneal laparoscopic radical prostatectomy by the four-step technique, abbreviating as C. R.P.C.[C: control DVC (dorsal deep venous complex). R: recognize three anatomical layers (prostate and bladder junction, seminal vesicle, and Denonvilliers’fascia surface). P: preserve urethral sphincter and bladder neck. C: continuous anastomosis between urethra and bladder neck (4 key needles at 3, 5, 7 and 9 o’clock)]. The operative time, estimated blood loss, length of hospital stay and postoperative complications were recorded, and the postoperative PSA was followed up. Results All the 102 cases were successfully treated by laparoscopic radical prostatectomy. The operative time was from 55 to 156 min (mean 92 min), and the estimated blood loss was from 55 to 185 ml (mean 105 ml). There was no case converted of open surgery, only one case received blood transfusion for postoperative hemorrhage (0.98%), and positive surgical margin was found in 15 case (14.70%) by pathological examination. Postoperative urinary extravasation within one week occurred in 2 (1.96%) cases, and resolved after tensioning the catheter and prolonging the indwelling time. During the follow-up period of 12 to 45 months, 2 cases were incontinent (grade Ⅰ-Ⅱ), and the other cases(98.04%) had no incontinence or dysuria . However, 11 cases(10.78%) developed to biochemical recurrence within 6 months after the operation. Conclusions The C. R.P.C. four-step technique of lparoscopic radical prostatectomy is easily to be grasped and performed by the greenhand urologists, and was efficient and safe. Key words: Prostatic neoplasms; Radical prostatectomy; Extraperitoneal laparoscopy; Prostate cancer; Four-step method; Curative effect

Significance of Time Until PSA Recurrence After Radical Prostatectomy Without Neo- or Adjuvant Treatment to Clinical Progression and Cancer-Related Death in High-Risk Prostate Cancer Patients.

Objective: The aim of our study was to evaluate the impact of time until biochemical recurrence (BCR) after radical prostatectomy (RP) without neo- or adjuvant treatment on clinical progression (CP) and cancer-related death (CRD) in high-risk prostate cancer (HRPCa) patients.Materials and methods: A total of 433 men with clinically HRPCa treated between 2001 and 2017 were identified. HRPCa was defined as clinical stage ≥T2c and/or biopsy Gleason score (GS) ≥8 and/or preoperative prostate specific antigen (PSA) value ≥20 ng/ml. Exclusion criteria were neo- or adjuvant treatment and incomplete pathological or follow-up data. BCR was defined as two consecutive PSA values ≥0.2 ng/ml after RP. CP was identified as skeletal lesions, local or loco-regional recurrence. CRD was defined as death from PCa. All men were divided into two groups according to BCR. The chi-square and t-tests were used to compare baseline characteristics between groups. Biochemical progression free survival (BPFS), clinical progression free survival (CPFS), and cancer-specific survival (CSS) rates were estimated using Kaplan–Meier analysis. Patients with detected BCR were analyzed for prediction of CP and CRD with respect to time until BCR. The impact of baseline parameters on BCR, CP, and CRD was assessed by Cox regression analysis.Results: BCR, CP, and CRD rates were 47.8% (207/433), 11.3% (49/433), and 5.5% (24/433), respectively. Median (quartiles) time of follow-up after RP was 64 (40–110) months. Ten-year BPFS rate was 34.2%; CPFS, 81%; and CSS, 90.1%. Men with detected BCR were analyzed for prediction of CP and CRD with respect to time until BCR. The most informative cutoff for time from RP until CP and CRD was ≤ 1 year (p < 0.008). According to this cutoff, men were divided into two groups: BCR detected within 1 year and after a 1-year period. Ten-year CPFS was 49.8% in men with early BCR vs. 81.1% in men with late BCR; CSS was 70.9 vs. 92.8% (p = 0.001). Multivariable analysis confirmed that time until BCR within 1 year predicts CP (p = 0.005) and CRD (p = 0.03).Conclusions: Early BCR is associated with poorer oncological outcomes. The presented results may help both to improve follow-up strategy and opt for more aggressive multimodal treatment of HRPCa in men with very early BCR.

Computerized histomorphometric features of glandular architecture predict risk of biochemical recurrence following radical prostatectomy: A multisite study.

5060 Background: Following a radical prostatectomy (RP) for prostate cancer, a patient may experience biochemical recurrence (BCR), defined as two consecutive prostate specific antigen (PSA) readings &gt; 0.2 ng/mL. BCR is correlated with metastasis and disease specific survival. Extant molecular based companion diagnostic tests for predicting risk of BCR and disease progression tend to be expensive and tissue destructive. We sought to evaluate whether computer extracted features of glandular architecture from routine digitized H&amp;E slides could predict post-RP BCR risk. Methods: RP specimens from 683 patients (184 with BCR, 499 without) with post-surgical PSA follow-up information were gathered from six sites. Median non-BCR follow-up was 3.2 years. A representative tumor area was annotated on the diagnostic H&amp;E slide of each patient. 324 (131 BCR) patients from two sites formed the training set. The other 359 (53 BCR) patients formed the validation set. Glands were segmented by a deep learning model. 216 features describing gland arrangement, shape, and disorder were then extracted. An elastic net Cox proportional hazards model was constructed from the training set using the top 10 stable features identified via feature selection. Risk score thresholds were chosen on the training set to stratify patients into low-, medium-, or high-risk. Validation set results were evaluated by the log-rank test and hazard ratio. For the 172 (37 BCR) patients for whom Gleason grade and preoperative PSA values were available, risk classifications were compared using Cox proportional hazards regression. Results: Nine of the top features were gland shape features and one was a gland arrangement feature. The hazard ratio between the low- and high-risk groups on the validation set was 3.04 (p &lt; 0.05). The histomorphometric classifier was predictive of BCR (p &lt; 0.05, hazard ratio = 1.63) independent of Gleason grade group and preoperative PSA in multivariate testing. Conclusions: Computer extracted features of gland morphology can stratify post-RP patients by BCR risk. Our computerized histomorphometric model could serve as a prognostic tool in the post-RP setting.[Table: see text]

Single Lesion on Prostate-specific Membrane Antigen-ligand Positron Emission Tomography and Low Prostate-specific Antigen Are Prognostic Factors for a Favorable Biochemical Response to Prostate-specific Membrane Antigen-targeted Radioguided Surgery in Recurrent Prostate Cancer

BackgroundProstate-specific membrane antigen (PSMA)-ligand positron emission tomography (PET) allows detection of metastatic prostate cancer (PC) lesions at low prostate-specific antigen (PSA) values. To facilitate their intraoperative detection during salvage surgery, we recently introduced PSMA-targeted radioguided surgery (RGS). ObjectiveTo describe the outcome of a large cohort of patients treated with PSMA-targeted RGS and to establish prognostic factors. Design, setting, and participantsA total of 121 consecutive patients with recurrent PC as defined by PSMA-ligand PET (median PSA: 1.13ng/ml) underwent PSMA-targeted RGS. Outcome measurements and statistical analysisThe frequency of a complete biochemical response (cBR; PSA <0.2ng/ml) without additional treatment and the duration of biochemical recurrence-free survival (bRFS, time from PSMA-targeted RGS with PSA <0.2ng/ml without further treatment) were evaluated and correlated with preoperatively available clinical variables. Results and limitationsIn almost all patients (120/121, 99%) metastatic tissue could be removed. A cBR was achieved in 77 patients (66%). The chance of cBR was highest in patients with both low preoperative PSA and a single lesion (38/45: 84%). Median bRFS was 6.4mo in the whole patient cohort and 19.8mo for patients with cBR. Significantly longer median bRFS was observed in patients with a low preoperative PSA value (p=0.004, hazard ratio 1.48, 95% confidence interval 1.13–1.93) and with a single lesion in preoperative PSMA-ligand PET (14.0 vs 2.5mo, p=0.002). ConclusionsPSMA-targeted RGS leads to a remarkable interval of bRFS in a subset of patients. The frequency of cBR and the duration of bRFS were highest in patients with a low preoperative PSA value and a single lesion on PSMA-ligand PET. Patient summaryProstate-specific membrane antigen radioguided surgery delays disease progression in selected patients with recurrent prostate cancer after radical prostatectomy. Patients with a single lesion of recurrence and a low prostate-specific antigen value had the best outcome.

Robot-Assisted Radical Prostatectomy in a Post−Kidney Transplant Patient: An Initial Case Report in China

ObjectiveOur aim was to evaluate the general applicability, feasibility, and safety of robot-assisted radical prostatectomy (RARP) in Chinese renal allograft patients for prostate cancer removal. Patients and MethodsA 62-year-old patient diagnosed as having biopsy-proven localized prostate cancer in March 2016 who had undergone renal transplant 12 years ago was studied. The preoperative prostate-specific antigen value was determined to be 11.82 ng/mL and the Gleason score was determined to be 3 + 3. The RARP was carried out using a transperitoneal and posterior approach with 5 ports in May 2016. The most important technique was ensuring that the transplanted kidney and ureter remained untouched during the surgery. Only the right obturator lymph nodes were dissected because the renal allograft was overlying the iliac vessels. ResultsThe RARP was successfully concluded following 230 minutes with an estimated blood loss of 200 mL. There were no postoperative complications. Final pathology was T2cN0M0, Gleason 3 + 3. Following catheter removal, the patient was completely continent and was discharged with no change in serum creatinine or glomerular filtration rate levels. During a 21-month follow-up, unobstructed urination, no incontinence, no biochemical recurrence, and normal kidney function were observed. ConclusionRARP in Chinese renal allograft patients is a feasible method that can be accomplished with no injuries to the transplanted kidney or ureter and is achieved with favorable oncological and functional outcomes. In addition, post−kidney transplant male patients are recommended to have routine prostate-specific antigen screening for the early detection of prostate cancer.

Abstract B72: DNA methylation and genetic alterations contribute to aggressive prostate cancer in African American men

Abstract Background: African-American (AA) men are more often diagnosed with early-onset aggressive prostate cancer than European American (EA) men. Prostate cancer health disparities between AA and EA men are attributed to socioeconomic as well as biologic differences existing between the two groups. The purpose of this study is to investigate how genetic and epigenetic alterations, specifically DNA methylation, contribute to early-onset aggressive prostate cancer in AA men. Methods: We performed 450K methylation array and RNA-sequencing on radical prostatectomy specimens from AA (n=32) and EA (n=5) men treated at Roswell Park Cancer Institute (RPCI). To increase analytical power, we included AA (n=22) and EA (n=172) patients from The Cancer Genome Atlas (TCGA) database. We found no significant difference in the average age between EA and AA men in the RPCI cohort, but the TCGA cohort consisted of AA men who had significantly lower average and median age compared to EA men (57 and 56 vs 61 and 62; p=0.019). We assessed baseline androgen receptor (AR) protein levels in matched benign and malignant AA (n=95) and EA (n=93) radical prostatectomy tissues from RPCI using immunohistochemistry. Gleason score &amp;lt;3+4 and &amp;gt;4+3 were classified as low and high aggressive tumors, respectively. Results: Unsupervised hierarchical clustering of DNA methylation levels in prostate cancers revealed 9 clusters. We focused on the 2 largest clusters, Cluster 1 (n=133) and Cluster 3 (n=73). Cluster 1 consisted predominantly of low aggressive disease (p=0.00002) with lower serum prostate specific antigen (PSA) values (8.97 vs 13.35 ng/ml) compared to Cluster 3. Following this trend, AA patients, but not EA patients, in Cluster 1 had better overall (57 vs 50 months, p=0.48) and disease-free time (47 vs 22 months, p=0.01) as compared to Cluster 3. ERG (ETS-related gene) fusion-positive prostate cancer is believed to be more aggressive than fusion-negative prostate cancer due to increased ERG gene transcription. We did not observe a difference in fusion status between the two DNA methylation clusters. However, overall DNA methylation was higher in fusion-negative samples as compared to fusion-positive samples in the TCGA dataset. ERG is known to bind to and reduce PSA, a direct downstream AR target. In the TCGA dataset, AA fusion-negative patients had higher average and median preoperative PSA values (18.38, 20.15 ng/ml) as compared with AA fusion-positive (7.51, 6.70 ng/ml), EA fusion-positive (9.43, 7.00 ng/ml), and EA fusion-negative patients (11.47, 7.50 ng/ml). There was no significant difference in the AR transcript and AR protein levels between fusion-positive and -negative AA and EA men. AR protein expression in RPCI cohort tissue microarrays showed that adjacent nontumor tissues from AA men had higher percent AR positive nuclei (p&amp;lt;0.05) compared to adjacent nontumor tissues from EA men. Conclusions: Analysis of the RPCI and TCGA cohorts indicated that DNA methylation separated low and high aggressive prostate cancer in AA men. Further analysis will include more patients as well as identify differences in specific CpG loci between Cluster 1 and Cluster 3. Our results suggest that DNA methylation alterations can be important in patients with ERG fusion-negative disease since these prostate cancers exhibit higher levels of overall DNA methylation. Lastly, our observations of higher AR expression in adjacent nontumor tissues suggest that there are underlying genetic variations that contribute to early-onset high aggressive prostate cancer in AA men compared to EA men. Citation Format: Swathi Ramakrishnan, Xuan Peng, Qianya Qi, Qiang Hu, Gissou Azabdaftari, Elena Pop, James Mohler, Kristopher Attwood, Li Yan, Jianmin Wang, Anna Woloszynska-Read. DNA methylation and genetic alterations contribute to aggressive prostate cancer in African American men [abstract]. In: Proceedings of the Tenth AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2017 Sep 25-28; Atlanta, GA. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2018;27(7 Suppl):Abstract nr B72.

Effects of urethral fibrosis on urinary control after laparoscopic radical prostatectomy

Objective: To determine the influence of urethral fibrosis on the recovery of urinary continence after laparoscopic radical prostatectomy. Method: A retrospective study of 203 patients from January 2010 to January 2014 who were underwent laparoscopic radical prostatectomy for prostate cancer in the First Affiliated Hospital of Fujian Medical University. The patients were divided into 2 groups according to preoperative T2-weighted magnetic resonance imaging of fibrosis status of the urethral wall and periurethral tissue. One hundred and forty-four(≤2 grade) and 59 (≥3 grade) were classified into the no/mild and severe urethral fibrosis groups respectively. Urinary continence at 1, 3, 6, 12 months after operation were compared between this two groups respectively. Result: There was no significant difference in the two groups with respect to age, body mass index (BMI), Charlson comorbidity index (CCI), international prostate symptom score (IPSS), prostate volume, preoperative prostate-specific antigen value, nerve-sparing procedure, postoperative Gleason score and pathological stage. The operation was completed successfully in all cases. With a median follow-up time of 15 months (ranged from 12 to 24 months), there was no statistical difference between the two groups in urinary continence at 1 month after operation (P>0.05). The incidences of continence in patients with no/mild fibrosis were significantly higher at 3, 6, 12 months after operation than those with severe fibrosis. (In the no/mild fibrosis group and severe fibrosis group, the continue rate at 3 mouths was 50.0% vs 28.8% P=0.005; at 6 mouths was 91.0% vs 59.3% P<0.001; at 12 mouths was 98.6% vs 88.1% P=0.003). Conclusion: Preoperative urethral fibrosis could be a significant predictor of recovery of the long-term urinary continence status after laparoscopic radical prostatectomy. Compared with no/mild fibrosis, severe fibrosis had worse long-term continence status.