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A periodontite tem sido reconhecida como um estímulo inflamatório sistêmico crônico com potencial risco para o desenvolvimento ou agravamento de várias condições de saúde sistêmica, incluindo doenças da próstata. Assim, este estudo apresenta duas propostas de investigação distintas com objetivos específicos: 1) um estudo caso-controle para avaliar a associação entre periodontite e câncer de próstata (CAP); 2) uma revisão sistemática e meta análise para avaliar a associação entre periodontite e os níveis de PSA (Antígeno Prostático Específico) O estudo caso-controle incluiu 372 indivíduos, sendo 152 homens com CAP (idade 63.028.67 anos) e 220 controles (idade 62.718.79 anos), selecionados no Ambulatório de Urologia do Hospital Luxemburgo, Belo Horizonte ­ Minas Gerais. Os participantes foram submetidos a exame periodontal completo e a condição periodontal classificada de acordo com os critérios da Academia Americana de Periodontia e da Federação Européia de Periodontologia de 2018. O estadiamento do CAP foi realizado de acordo com os escores do sistema de Gleason. A associação entre CAP e variáveis de interesse foi avaliada por regressão logística multivariada. Os casos apresentaram maior ocorrência (p=0,019) e gravidade (p=0,005) de periodontite. A ocorrência de CAP foi associada a escolaridade <9 anos (OR ajustado=1,95), ao consumo de álcool (OR ajustado=3,46), ao tabagismo (OR ajustado=2,53) e a periodontite (OR ajustado=1,76). Em relação à gravidade do CAP, os escores de Gleason 1-2 foram associados à periodontite (OR ajustado=1,90), mas os escores de Gleason 3-5 não. Além disso, foi observado no grupo caso um aumento dos níveis de PSA com o aumento da gravidade da periodontite (estágios). A revisão sistemática se baseou nas diretrizes do PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) e teve a seguinte pergunta PECO: homens com periodontite apresentam níveis aumentados de PSA no sangue? Foi realizada uma busca nas bases de dados PubMed, Embase, Scielo, Web of Sciences, Cochrane Library e literatura cinzenta até janeiro/2024. Foram incluídos 6 estudos, sendo 4 estudos observacionais e 2 ensaios clínicos. A qualidade metodológica foi avaliada usando as ferramentas Joana Briggs e ROBINS-I e o nível de evidência usando o sistema GRADE. Os estudos observacionais apontaram níveis de APE significativamente mais baixos em indivíduos sem periodontite (p=0,04). Os ensaios clínicos não randomizados não verificaram mudança nos níveis de PSA após o tratamento periodontal não-cirúrgico (p=0,13). Na metanálise, indivíduos com PSA>4,0 ng/ml apresentaram periodontite mais grave (OR=1,19 IC95% 0,68­2,09; I2=0%), entretanto não significativo. Houve correlação positiva entre PSA e nível de inserção clínica (r=0,55 IC95% 0,41­0,66; I2=0,0%). Não houve diferença nos níveis de PSA antes e após o tratamento periodontal (diferença média -0,18 IC95% -0,94­0,57; I2=0%). No geral, concluiu-se que a periodontite foi associada à ocorrência de câncer de próstata e não houve evidências de uma associação direta entre níveis de PSA e periodontite, apesar de observações sugerirem possível relação entre a gravidade da periodontite, parâmetros clínicos periodontais e PSA.

Periodontitis has been recognized as a chronic systemic inflammatory stimulus with potential risk for the development or worsening of several systemic health conditions, including prostate diseases. Thus, this study presents two specific research proposals with specific objectives: 1) a case-control study to evaluate the association between periodontitis and prostate cancer (PCA); 2) a systematic review and meta-analysis to evaluate the association between periodontitis and PSA (prostate-specific antigen) levels. The case-control study included 372 individuals, being 152 men with CAP (age 63.02 ± 8.67 years) and 220 controls (age 62.71 ± 8.79 years), selected at the Urology Outpatient Clinic of Hospital Luxemburgo, Belo Horizonte ­ Minas Gerais. Participants underwent a complete periodontal examination and periodontal status was classified according to the 2018 American Academy of Periodontology and European Federation of Periodontology criteria. CAP staging was performed according to Gleason system scores. The association between CAP and variables of interest was assessed by multivariate logistic regression. Cases had a higher occurrence (p=0.019) and severity (p=0.005) of periodontitis. The occurrence of CAP was associated with educational level <9 years (adjusted OR=1.95), alcohol consumption (adjusted OR=3.46), smoking (adjusted OR=2.53), and periodontitis (adjusted OR=1.76). Regarding CAP severity, Gleason scores 1­2 were associated with periodontitis (adjusted OR=1.90), but Gleason scores 3­5 were not. Furthermore, an increase in PSA levels was observed in the case group with increasing severity of periodontitis (stages). The systematic review was based on the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines and had the following PECO question: Do men with periodontitis have increased blood levels of PSA? A search was carried out in the PubMed, Embase, Scielo, Web of Sciences, Cochrane Library databases and gray literature until January/2024. Six studies were included, being 4 observational studies and 2 clinical trials. The methodological quality was assessed using the Joana Briggs and ROBINS-I tools and the level of evidence using the GRADE system. Observational studies showed significantly lower PSA levels in individuals without periodontitis (p=0.04). Non-randomized clinical trials did not find changes in PSA levels after non surgical periodontal treatment (p=0.13). In the meta-analysis, individuals with PSA>4.0 ng/ml had more severe periodontitis (OR=1.19 95%CI 0.68­2.09; I2=0%), although not significant. There was a positive correlation between PSA and clinical attachment level (r=0.55 95%CI 0.41­0.66; I2=0.0%). There was no difference in PSA levels before and after periodontal treatment (mean difference -0.18 95%CI -0.94­0.57; I2=0%). Overall, it was concluded that periodontitis was associated with the occurrence of prostate cancer and there was no evidence of a direct association between PSA levels and periodontitis, although observations suggest a possible relationship between the severity of periodontitis, clinical periodontal parameters and PSA.

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Objetivo: Describir las características clínicas, complicaciones intraquirúrgicas y posquirúrgicas y los desenlaces oncológicos de los pacientes sometidos a prostatectomía radical por laparoscopia en un centro de alta complejidad en la ciudad de Cali, Colombia. Método: Estudio observacional de cohorte retrospectiva entre el 2011 y el 2021. Se incluyeron pacientes llevados a prostatectomía laparoscópica por diagnóstico de cáncer de próstata. Se clasificaron en bajo, mediano y alto riesgo según antígeno específico de próstata (PSA) y estadios clínicos TNM. Se agruparon según la escala de la International Society of Urological Pathology (ISUP). La clasificación D'Amico determinó el riesgo de recurrencia bioquímica. Se realizó un análisis de supervivencia a 60 meses según el método de Kaplan-Meier. Se estimaron los factores relacionados con la recaída y la probabilidad de tiempo libre de enfermedad con la regresión de Cox univariante y multivariante. Resultados: Se incluyeron 379 pacientes. La mediana de PSA inicial fue de 8,3. El 25,34% fue clasificado como patología localmente avanzada. La supervivencia global a cinco años fue del 97%. Los pacientes con persistencia bioquímica con enfermedad localmente avanzada tuvieron un 44% de probabilidad de recaer. La probabilidad de recaída a cinco años en pacientes con riesgo alto era de del 35%. Conclusiones: El factor de riesgo con mayor impacto en la recaída oncológica a los 60 meses es la persistencia bioquímica a los seis meses del procedimiento. Los pacientes con alto riesgo según la clasificación D'Amico presentaron una mayor recaída.

Objective: To describe the clinical characteristics, intra- and post-surgical complications, and oncological outcomes of patients undergoing laparoscopic radical prostatectomy in a high-complexity center in the city of Cali, Colombia. Method: Observational retrospective cohort study between 2011 and 2021. Patients undergoing laparoscopic prostatectomy with diagnosis of prostate cancer were included. They were classified as low, medium and high risk according to prostate specific antigen (PSA) and clinical TNM. They were grouped according to the International Society of Urological Pathology (ISUP) scale. The D'Amico classification determined the risk of biochemical recurrence. A 60-month survival analysis was performed according to the Kaplan-Meier method. Factors related to relapse and the probability of disease-free time were estimated with univariate and multivariate Cox regression. Results: Three hundred and seventy-nine patients were included. The median initial PSA was 8.3. Twenty-five-point thirty-four percent were classified as locally advanced pathology. The 5-year overall survival was 97%. Patients with biochemical persistence with locally advanced disease had a 44% probability of relapse. The 5-year probability of relapse in high-risk patients was 35%. Conclusions: The risk factor with the greatest impact on oncological relapse at 60 months is biochemical persistence 6 months after the procedure. Patients with high risk according to the D'Amico classification had a greater relapse

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INTRODUCCIÓN: El cáncer prostático (CaP) es una patología de alta prevalencia e incidencia mundial. El tamizaje ha perseguido el diagnóstico precoz de esta enfermedad para otorgar tratamientos oportunos. Nosotros buscamos caracterizar los pacientes de un hospital local respecto al diagnóstico y etapificación, y comparar estos resultados con datos previamente reportados. MATERIAL Y MÉTODO: Análisis retrospectivo de pacientes diagnosticados con CaP en un hospital institucional. Se recolectaron variables clínicas al momento del diagnóstico, los métodos de etapificación, el estadío según TNM y grado histológico. RESULTADOS: Se incluyeron 129 pacientes en el análisis. La mediana de APE (ng/mL) al diagnóstico fue de 7,29. El grado histológico fue clasificado como ISUP 1 en 37,5%. Se realizó una resonancia magnética multiparamétrica de próstata (RMmp) en el 42,19% de los pacientes, siendo clasificados como PIRADS 4 en mayor proporción (21,09%). La etapificación con PET-CT PSMA se utilizó principalmente en el grupo de alto riesgo y ante dudas frente a etapificación con medios convencionales. Se prefirió la Tomografía computada (TC) contrastada y la cintigrafía ósea en los otros grupos. 6,25% fue catalogado N1 y 9,37% M1. CONCLUSIÓN: La etapa al diagnóstico de nuestra serie es algo mayor a lo reportado por países desarrollados, pero considerablemente menor a lo publicado por otros países de Latinoamérica e inclusive de otros hospitales de nuestro país. Pareciera ser de gran relevancia nacional contar con protocolos claros de tamizaje y acceso a APE con el fin de disminuir los casos diagnosticados en etapas avanzadas.

INTRODUCTION: Prostate cancer (PCa) is a disease with a high prevalence and incidence worldwide. Screening has pursued the early diagnosis of this disease to provide early treatment. We sought to characterize patients from a local hospital with respect to diagnosis and staging and to compare these results with previously reported data. METHODS: We conducted a retrospective analysis of patients diagnosed with PCa at an institutional hospital. Clinical variables were collected at the time of diagnosis, staging methods, TNM stage, and histological grade. RESULTS: 129 patients were included in the analysis. The median PSA (ng/mL) at diagnosis was 7.29. The histological grade was classified as ISUP 1 in 37.5%. An MRI was performed in 42.19% of the patients, being classified mostly as PIRADS 4 (21.09%). PET-CT PSMA staging was used mainly in the high-risk group, preferring contrast-enhanced CT and bone scintigraphy in the other groups. 6.25% were classified as N1 and 9.37% as M1. CONCLUSION: The stage at diagnosis in our series is somewhat higher than that reported by developed countries but considerably lower than that published by other Latin American countries and even from other hospitals in our country. It is of great national relevance to have clear protocols for screening and access to PSA to reduce the cases diagnosed in advanced stages.

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Magnetic resonance imaging (MRI)-targeted prostate biopsy is the recommended investigation in men with suspicious lesion(s) on MRI. The role of concurrent systematic in addition to targeted biopsies is currently unclear. Using our prospectively maintained database, we identified men with at least one Prostate Imaging-Reporting and Data System (PI-RADS) ≥3 lesion who underwent targeted and/or systematic biopsies from May 2016 to May 2020. Clinically significant prostate cancer (csPCa) was defined as any Gleason grade group ≥2 cancer. Of 545 patients who underwent MRI fusion-targeted biopsy, 222 (40.7%) were biopsy naïve, 247 (45.3%) had previous prostate biopsy(s), and 76 (13.9%) had known prostate cancer undergoing active surveillance. Prostate cancer was more commonly found in biopsy-naïve men (63.5%) and those on active surveillance (68.4%) compared to those who had previous biopsies (35.2%; both P < 0.001). Systematic biopsies provided an incremental 10.4% detection of csPCa among biopsy-naïve patients, versus an incremental 2.4% among those who had prior negative biopsies. Multivariable regression found age (odds ratio [OR] = 1.03, P = 0.03), prostate-specific antigen (PSA) density ≥0.15 ng ml-2 (OR = 3.24, P < 0.001), prostate health index (PHI) ≥35 (OR = 2.43, P = 0.006), higher PI-RADS score (vs PI-RADS 3; OR = 4.59 for PI-RADS 4, and OR = 9.91 for PI-RADS 5; both P < 0.001) and target lesion volume-to-prostate volume ratio ≥0.10 (OR = 5.26, P = 0.013) were significantly associated with csPCa detection on targeted biopsy. In conclusion, for men undergoing MRI fusion-targeted prostate biopsies, systematic biopsies should not be omitted given its incremental value to targeted biopsies alone. The factors such as PSA density ≥0.15 ng ml-2, PHI ≥35, higher PI-RADS score, and target lesion volume-to-prostate volume ratio ≥0.10 can help identify men at higher risk of csPCa.

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This study explored a new model of Prostate Imaging Reporting and Data System (PIRADS) and adjusted prostate-specific antigen density of peripheral zone (aPSADPZ) for predicting the occurrence of prostate cancer (PCa) and clinically significant prostate cancer (csPCa). The demographic and clinical characteristics of 853 patients were recorded. Prostate-specific antigen (PSA), PSA density (PSAD), PSAD of peripheral zone (PSADPZ), aPSADPZ, and peripheral zone volume ratio (PZ-ratio) were calculated and subjected to receiver operating characteristic (ROC) curve analysis. The calibration and discrimination abilities of new nomograms were verified with the calibration curve and area under the ROC curve (AUC). The clinical benefits of these models were evaluated by decision curve analysis and clinical impact curves. The AUCs of PSA, PSAD, PSADPZ, aPSADPZ, and PZ-ratio were 0.669, 0.762, 0.659, 0.812, and 0.748 for PCa diagnosis, while 0.713, 0.788, 0.694, 0.828, and 0.735 for csPCa diagnosis, respectively. All nomograms displayed higher net benefit and better overall calibration than the scenarios for predicting the occurrence of PCa or csPCa. The new model significantly improved the diagnostic accuracy of PCa (0.945 vs 0.830, P < 0.01) and csPCa (0.937 vs 0.845, P < 0.01) compared with the base model. In addition, the number of patients with PCa and csPCa predicted by the new model was in good agreement with the actual number of patients with PCa and csPCa in high-risk threshold. This study demonstrates that aPSADPZ has a higher predictive accuracy for PCa diagnosis than the conventional indicators. Combining aPSADPZ with PIRADS can improve PCa diagnosis and avoid unnecessary biopsies.

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A cross-sectional study was conducted to estimate the age-stratified normal levels and age-related changes in the risk predictors of benign prostatic hyperplasia (BPH) progression. A total of 4706 male participants aged 40 years or older in Zhengzhou (China) were enrolled. The values of the International Prostate Symptom Score (IPSS), prostate-specific antigen (PSA), prostate volume (PV), and postvoid residual urine volume (PVR) significantly increased with age. Nonlinear relationships between age and IPSS scores ≥8 (P for nonlinearity = 0.046), PSA level ≥1.6 ng ml-1, PV ≥31 ml, or PVR ≥39 ml (all P for nonlinearity <0.001) were observed. After the age of 61 years, the risk indicators related to BPH progression were positively correlated with age (odds ratio [OR] >1), regardless of the predictors of the IPSS score, PSA level, PV, or PVR; and the OR values increased gradually. Therefore, after the age of 61 years, the risk predictors related to BPH progression were positively correlated with age.

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This study investigated whether free prostate-specific antigen (fPSA) performs better than total PSA (tPSA) in predicting prostate volume (PV) in Chinese men with different PSA levels. A total of 5463 men with PSA levels of <10 ng ml-1 and without prostate cancer diagnosis were included in this study. Patients were classified into four groups: PSA <2.5 ng ml-1, 2.5-3.9 ng ml-1, 4.0-9.9 ng ml-1, and 2.5-9.9 ng ml-1. Pearson/Spearman's correlation coefficient (r) and receiver operating characteristic (ROC) curves were used to evaluate the ability of tPSA and fPSA to predict PV. The correlation coefficient between tPSA and PV in the PSA <2.5 ng ml-1 cohort (r = 0.422; P < 0.001) was markedly higher than those of the cohorts with PSA levels of 2.5-3.9 ng ml-1, 4.0-9.9 ng ml-1, and 2.5-9.9 ng ml-1 (r = 0.114, 0.167, and 0.264, respectively; all P ≤ 0.001), while fPSA levels did not differ significantly among different PSA groups. Area under ROC curve (AUC) analyses revealed that the performance of fPSA in predicting PV ≥40 ml (AUC: 0.694, 0.714, and 0.727) was better than that of tPSA (AUC = 0.545, 0.561, and 0.611) in men with PSA levels of 2.5-3.9 ng ml-1, 4.0-9.9 ng ml-1, and 2.5-9.9 ng ml-1, respectively, but not at PSA levels of <2.5 ng ml-1 (AUC: 0.713 vs 0.720). These findings suggest that the relationship between tPSA and PV may vary with PSA level and that fPSA is more powerful at predicting PV only in the ''gray zone'' (PSA levels of 2.5-9.9 ng ml-1), but its performance was similar to that of tPSA at PSA levels of <2.5 ng ml-1.

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Management and treatment of terminal metastatic castration-resistant prostate cancer (mCRPC) remains heavily debated. We sought to investigate the efficacy of programmed cell death 1 (PD-1) inhibitor plus anlotinib as a potential solution for terminal mCRPC and further evaluate the association of genomic characteristics with efficacy outcomes. We conducted a retrospective real-world study of 25 mCRPC patients who received PD-1 inhibitor plus anlotinib after the progression to standard treatments. The clinical information was extracted from the electronic medical records and 22 patients had targeted circulating tumor DNA (ctDNA) next-generation sequencing. Statistical analysis showed that 6 (24.0%) patients experienced prostate-specific antigen (PSA) response and 11 (44.0%) patients experienced PSA reduction. The relationship between ctDNA findings and outcomes was also analyzed. DNA-damage repair (DDR) pathways and homologous recombination repair (HRR) pathway defects indicated a comparatively longer PSA-progression-free survival (PSA-PFS; 2.5 months vs 1.2 months, P = 0.027; 3.3 months vs 1.2 months, P = 0.017; respectively). This study introduces the PD-1 inhibitor plus anlotinib as a late-line therapeutic strategy for terminal mCRPC. PD-1 inhibitor plus anlotinib may be a new treatment choice for terminal mCRPC patients with DDR or HRR pathway defects and requires further investigation.

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BACKGROUND@#LY01005 (Goserelin acetate sustained-release microsphere injection) is a modified gonadotropin-releasing hormone (GnRH) agonist injected monthly. This phase III trial study aimed to evaluated the efficacy and safety of LY01005 in Chinese patients with prostate cancer.@*METHODS@#We conducted a randomized controlled, open-label, non-inferiority trial across 49 sites in China. This study included 290 patients with prostate cancer who received either LY01005 or goserelin implants every 28 days for three injections. The primary efficacy endpoints were the percentage of patients with testosterone suppression ≤50 ng/dL at day 29 and the cumulative probability of testosterone ≤50 ng/dL from day 29 to 85. Non-inferiority was prespecified at a margin of -10%. Secondary endpoints included significant castration (≤20 ng/dL), testosterone surge within 72 h following repeated dosing, and changes in luteinizing hormone, follicle-stimulating hormone, and prostate specific antigen levels.@*RESULTS@#On day 29, in the LY01005 and goserelin implant groups, testosterone concentrations fell below medical-castration levels in 99.3% (142/143) and 100% (140/140) of patients, respectively, with a difference of -0.7% (95% confidence interval [CI], -3.9% to 2.0%) between the two groups. The cumulative probabilities of maintaining castration from days 29 to 85 were 99.3% and 97.8%, respectively, with a between-group difference of 1.5% (95% CI, -1.3% to 4.4%). Both results met the criterion for non-inferiority. Secondary endpoints were similar between groups. Both treatments were well-tolerated. LY01005 was associated with fewer injection-site reactions than the goserelin implant (0% vs . 1.4% [2/145]).@*CONCLUSION@#LY01005 is as effective as goserelin implants in reducing testosterone to castration levels, with a similar safety profile.@*TRIAL REGISTRATION@#ClinicalTrials.gov, NCT04563936.

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The final analysis of the phase 3 Targeted Investigational Treatment Analysis of Novel Anti-androgen (TITAN) trial showed improvement in overall survival (OS) and other efficacy endpoints with apalutamide plus androgen deprivation therapy (ADT) versus ADT alone in patients with metastatic castration-sensitive prostate cancer (mCSPC). As ethnicity and regional differences may affect treatment outcomes in advanced prostate cancer, a post hoc final analysis was conducted to assess the efficacy and safety of apalutamide in the Asian subpopulation. Event-driven endpoints were OS, and time from randomization to initiation of castration resistance, prostate-specific antigen (PSA) progression, and second progression-free survival (PFS2) on first subsequent therapy or death. Efficacy endpoints were assessed using the Kaplan-Meier method and Cox proportional-hazards models without formal statistical testing and adjustment for multiplicity. Participating Asian patients received once-daily apalutamide 240 mg ( n = 111) or placebo ( n = 110) plus ADT. After a median follow-up of 42.5 months and despite crossover of 47 placebo recipients to open-label apalutamide, apalutamide reduced the risk of death by 32% (hazard ratio [HR]: 0.68; 95% confidence interval [CI]: 0.42-1.13), risk of castration resistance by 69% (HR: 0.31; 95% CI: 0.21-0.46), PSA progression by 79% (HR: 0.21; 95% CI: 0.13-0.35) and PFS2 by 24% (HR: 0.76; 95% CI: 0.44-1.29) relative to placebo. The outcomes were comparable between subgroups with low- and high-volume disease at baseline. No new safety issues were identified. Apalutamide provides valuable clinical benefits to Asian patients with mCSPC, with an efficacy and safety profile consistent with that in the overall patient population.

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Using prostate-specific antigen (PSA) for prostate cancer (PCa) screening led to overinvestigation and overdiagnosis of indolent PCa. We aimed to investigate the value of prostate health index (PHI) and magnetic resonance imaging (MRI) prostate in an Asian PCa screening program. Men aged 50-75 years were prospectively recruited from a community-based PSA screening program. Men with PSA 4.0-10.0 ng ml -1 had PHI result analyzed. MRI prostate was offered to men with PSA 4.0-50.0 ng ml -1 . A systematic prostate biopsy was offered to men with PSA 4.0-9.9 ng ml -1 and PHI ≥35, or PSA 10.0-50.0 ng ml -1 . Additional targeted prostate biopsy was offered if they had PI-RADS score ≥3. Clinically significant PCa (csPCa) was defined as the International Society of Urological Pathology (ISUP) grade group (GG) ≥2 or ISUP GG 1 with involvement of ≥30% of total systematic cores. In total, 12.8% (196/1536) men had PSA ≥4.0 ng ml -1 . Among 194 men with PSA 4.0-50.0 ng ml -1 , 187 (96.4%) received MRI prostate. Among them, 28.3% (53/187) had PI-RADS ≥3 lesions. Moreover, 7.0% (107/1536) men were indicated for biopsy and 94.4% (101/107) men received biopsy. Among the men received biopsy, PCa, ISUP GG ≥2 PCa, and csPCa was diagnosed in 42 (41.6%), 24 (23.8%), and 34 (33.7%) men, respectively. Compared with PSA/PHI pathway in men with PSA 4.0-50.0 ng ml -1 , additional MRI increased diagnoses of PCa, ISUP GG ≥2 PCa, and csPCa by 21.2% (from 33 to 40), 22.2% (from 18 to 22), and 18.5% (from 27 to 32), respectively. The benefit of additional MRI was only observed in PSA 4.0-10.0 ng ml -1 , and the number of MRI needed to diagnose one additional ISUP GG ≥2 PCa was 20 in PHI ≥35 and 94 in PHI <35. Among them, 45.4% (89/196) men with PSA ≥4.0 ng ml -1 avoided unnecessary biopsy with the use of PHI and MRI. A screening algorithm with PSA, PHI, and MRI could effectively diagnose csPCa while reducing unnecessary biopsies. The benefit of MRI prostate was mainly observed in PSA 4.0-9.9 ng ml -1 and PHI ≥35 group. PHI was an important risk stratification step for PCa screening.

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To evaluate the safety and efficacy of neoadjuvant radiohormonal therapy for oligometastatic prostate cancer (OMPC), we conducted a 3 + 3 dose escalation, prospective, phase I/II, single-arm clinical trial (CHiCTR1900025743), in which long-term neoadjuvant androgen deprivation was adopted 1 month before radiotherapy, comprising intensity modulated radiotherapy to the pelvis, and stereotactic body radiation therapy to all extra-pelvic bone metastases for 4-7 weeks, at 39.6, 45, 50.4, and 54 Gy. Robotic-assisted radical prostatectomy was performed after 5-14 weeks. The primary outcome was treatment-related toxicities and adverse events; secondary outcomes were radiological treatment response, positive surgical margin (pSM), postoperative prostate-specific antigen (PSA), pathological down-grading and tumor regression grade, and survival parameters. Twelve patients were recruited from March 2019 to February 2020, aging 66.2 years in average (range, 52-80). Median baseline PSA was 62.0 ng/mL. All underwent RARP successfully without open conversions. Ten patients recorded pathological tumor down-staging (83.3%), and 5 (41.7%) with cN1 recorded negative regional lymph nodes on final pathology. 66.7% (8/12) recorded tumor regression grading (TRG) -I and 25% (3/12) recorded TRG-II. Median follow-up was 16.5 months. Mean radiological progression-free survival (RPFS) was 21.3 months, with 2-year RPFS of 83.3%. In all, neoadjuvant radiohormonal therapy is well tolerated for oligometastatic prostate cancer.

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OBJECTIVES@#To investigate the prevalence of pathogenic germline mutations of mismatch repair (MMR) genes in prostate cancer patients and its relationship with clinicopathological characteristics.@*METHODS@#Germline sequencing data of 855 prostate cancer patients admitted in Fudan University Shanghai Cancer Center from 2018 to 2022 were retrospectively analyzed. The pathogenicity of mutations was assessed according to the American College of Medical Genetics and Genomics (ACMG) standard guideline, Clinvar and Intervar databases. The clinicopathological characteristics and responses to castration treatment were compared among patients with MMR gene mutation (MMR+ group), patients with DNA damage repair (DDR) gene germline pathogenic mutation without MMR gene (DDR+MMR－ group) and patients without DDR gene germline pathogenic mutation (DDR－ group).@*RESULTS@#Thirteen (1.52%) MMR+ patients were identified in 855 prostate cancer patients, including 1 case with MLH1 gene mutation, 6 cases with MSH2 gene mutation, 4 cases with MSH6 gene mutation and 2 cases with PMS2 gene mutation. 105 (11.9%) patients were identified as DDR gene positive (except MMR gene), and 737 (86.2%) patients were DDR gene negative. Compared with DDR－ group, MMR+ group had lower age of onset (P<0.05) and initial prostate-specific antigen (PSA) (P<0.01), while no significant differences were found between the two groups in Gleason score and TMN staging (both P>0.05). The median time to castration resistance was 8 months (95%CI: 6 months-not achieved), 16 months (95%CI: 12-32 months) and 24 months (95%CI: 21-27 months) for MMR+ group, DDR+MMR－ group and DDR－ group, respectively. The time to castration resistance in MMR+ group was significantly shorter than that in DDR+MMR－ group and DDR－ group (both P<0.01), while there was no significant difference between DDR+MMR－ group and DDR－ group (P>0.05).@*CONCLUSIONS@#MMR gene mutation testing is recommended for prostate cancer patients with early onset, low initial PSA, metastasis or early resistance to castration therapy.

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OBJECTIVE@#To evaluate the diagnostic value of dynamic contrast enhanced (DCE) of multiparametric magnetic resonance imaging (mpMRI) for prostate imaging reporting and data system (PI-RADS) 4 lesion in prostate peripheral zone.@*METHODS@#The clinical data of patients with PI-RADS 4 lesion in prostate peripheral zone who underwent prostate biopsy from January 2018 to September 2021 in Peking University First Hospital were retrospectively included. According to DCE status, the patients were divided into the conventional group (4 points for diffusion-weighted imaging) and the comprehensive group (3 points for diffusion-weighted imaging + 1 point for DCE positive). Pearson's chi-square test or Fisher's exact test for comparison was conducted between prostate cancer and non-cancer patients. Univariate and multivariate Logistic regression were performed to analyze the correlation of positive biopsy with age, total prostate specific antigen (PSA), free PSA/total PSA (f/tPSA), prostate volume (PV), PSA density (PSAD) and DCE status.@*RESULTS@#Among the 267 prostate biopsy patients, 217 cases were diagnosed as prostatic cancer (81.27%) and 50 cases were non-cancer (18.73%). Statistical analysis between the prostatic cancer group and the non-cancer group showed that there were significant differences in age, tPSA, PV and PSAD (all P < 0.05), but no significant differences in f/tPSA between the two groups. About different PI-RADS 4 lesion groups, the conventional group and the comprehensive group showed significant difference in biopsy results (P=0.001), and the conventional group had a higher positive rate. The PV of comprehensive group was larger than that of the conventional group. Among the prostate cancer patients diagnosed by biopsy, statistical analysis between the conventional group and comprehensive group showed that there were not significant differences in International Society of Urological Pathology (ISUP) grade and distinguishing clinically significant prostate cancer (all P > 0.05). Logistic univariate analysis showed that the diagnosis of prostate cancer was related to age, tPSA, f/tPSA, PV and DCE group status (all P < 0.05). Multivariate analysis showed that age, tPSA, PV and DCE group status (all P < 0.05) were independent risk factors for the diagnosis of prostatic cancer.@*CONCLUSION@#tPSA, f/tPSA, PV and PSAD are the indicators to improve the diagnosis of prostatic cancer with PI-RADS 4 lesion in peripheral zone lesions. DCE status is worth considering, so that we can select patients for biopsy more accurately, reduce the rate of missed diagnosis of prostate cancer as well as avoid unnecessary prostate puncture.

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Objective: To analyze the relationship between Prostate Imaging Reporting and Data System (PI-RADS) scores and the pathological results of transperineal magnetic resonance-ultrasound fusion guided biopsy. Methods: The clinical data, magnetic resonance imaging (MRI) results and prostate puncture biopsies of 517 patients who were assigned to PI-RADS score of 4 or 5 and underwent transperineal magnetic resonance-ultrasound fusion guided biopsy at The First Affiliated Hospital of Nanjing Medical University from June 2019 to March 2022 were retrospectively analyzed. Patients were divided into the PI-RADS 4 and PI-RADS 5 groups according to their PI-RADS scores and were stratified by their prostate specific antigen (PSA) values (PSA<10 ng/ml vs. PSA 10-20 ng/ml). The pathological negative rates from the biopsy, the distribution of the grade groups according to the grading system by World Health Organization/International Society of Urological Pathology (WHO/ISUP), the detection rates of prostate cancer (PCa) and clinically significant prostate cancer (CsPCa)between the groups were compared. Results: 369 patients with a PI-RADS score of 4 and 148 patients with a PI-RADS score of 5 were included in our research. The overall detection rates of PCa and CsPCa were 77.8% (402/517) and 66.7% (345/517), respectively. In the PI-RADS 4 group, patients with prostate negative biopsies or in WHO/ISUP 1, 2, 3, 4, or 5 grade groups accounted for 28.2%, 12.7%, 20.1%, 17.1%, 18.4% and 3.5%, respectively, whereas in the PI-RADS 5 group the rates were 7.4%, 6.8%, 22.3%, 22.3%, 26.4%, and 14.9%, respectively. The difference was statistically significant (P<0.001). The detection rates of PCa and CsPCa in the PI-RADS 4 group [71.8% (265/369) vs. 59.1% (218/369), P<0.001] were lower than those of the PI-RADS 5 group [92.6% (137/148) vs. 85.8% (127/148), P<0.001]. In the PI-RADS 4 group, the proportion of patients classified into WHO/ISUP 4-5 grade groups was lower than that of patients in the PI-RADS 5 group [22.0% (81/369) vs 41.2% (61/148) (P<0.001)]. The detection rates of PCa and CsPCa in the PSA<10 ng/ml stratification were less than that in the PSA 10-20 ng/ml stratification[74.1% (281/379) vs. 87.7% (121/138), P=0.001], and [60.9% (231/379) vs. 82.6% (114/138), P<0.001]. For patients with PSA<10 ng/ml, the detection rates of PCa and CsPCa in the PI-RADS 4 group were less than those in the PI-RADS5 group [70.9% (217/306) vs. 87.7% (64/73), P=0.003], and [56.2% (172/306) vs. 80.8% (59/73), P<0.001]. For those with a PSA value of 10-20 ng/ml, the detection rates of PCa and CsPCa in the PI-RADS 4 group were less than those in the PI-RADS 5 group [76.2% (48/63) vs. 97.3% (73/75), P<0.001], and [73.0% (46/63) vs. 90.7% (68/75), P=0.006]. There were statistically significant differences in the proportions of patients with prostate negative biopsy and those falling into WHO/ISUP grade groups 1, 2, 3, 4, or 5 (P<0.001) between the PI-RADS 4 group and the PI-RADS 5 group in both stratifications. Conclusions: In this study, the detection rates of CsPCa and PCa in the PI-RADS 4 group were less than those in the PI-RADS 5 group. With the increase of PI-RADS scores, the detection rate of high-grade PCa increased. The same results held for patients with PSA<10 ng/ml or with PSA 10-20 ng/ml.

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Objective: To analyze the relationship between Prostate Imaging Reporting and Data System (PI-RADS) scores and the pathological results of transperineal magnetic resonance-ultrasound fusion guided biopsy. Methods: The clinical data, magnetic resonance imaging (MRI) results and prostate puncture biopsies of 517 patients who were assigned to PI-RADS score of 4 or 5 and underwent transperineal magnetic resonance-ultrasound fusion guided biopsy at The First Affiliated Hospital of Nanjing Medical University from June 2019 to March 2022 were retrospectively analyzed. Patients were divided into the PI-RADS 4 and PI-RADS 5 groups according to their PI-RADS scores and were stratified by their prostate specific antigen (PSA) values (PSA<10 ng/ml vs. PSA 10-20 ng/ml). The pathological negative rates from the biopsy, the distribution of the grade groups according to the grading system by World Health Organization/International Society of Urological Pathology (WHO/ISUP), the detection rates of prostate cancer (PCa) and clinically significant prostate cancer (CsPCa)between the groups were compared. Results: 369 patients with a PI-RADS score of 4 and 148 patients with a PI-RADS score of 5 were included in our research. The overall detection rates of PCa and CsPCa were 77.8% (402/517) and 66.7% (345/517), respectively. In the PI-RADS 4 group, patients with prostate negative biopsies or in WHO/ISUP 1, 2, 3, 4, or 5 grade groups accounted for 28.2%, 12.7%, 20.1%, 17.1%, 18.4% and 3.5%, respectively, whereas in the PI-RADS 5 group the rates were 7.4%, 6.8%, 22.3%, 22.3%, 26.4%, and 14.9%, respectively. The difference was statistically significant (P<0.001). The detection rates of PCa and CsPCa in the PI-RADS 4 group [71.8% (265/369) vs. 59.1% (218/369), P<0.001] were lower than those of the PI-RADS 5 group [92.6% (137/148) vs. 85.8% (127/148), P<0.001]. In the PI-RADS 4 group, the proportion of patients classified into WHO/ISUP 4-5 grade groups was lower than that of patients in the PI-RADS 5 group [22.0% (81/369) vs 41.2% (61/148) (P<0.001)]. The detection rates of PCa and CsPCa in the PSA<10 ng/ml stratification were less than that in the PSA 10-20 ng/ml stratification[74.1% (281/379) vs. 87.7% (121/138), P=0.001], and [60.9% (231/379) vs. 82.6% (114/138), P<0.001]. For patients with PSA<10 ng/ml, the detection rates of PCa and CsPCa in the PI-RADS 4 group were less than those in the PI-RADS5 group [70.9% (217/306) vs. 87.7% (64/73), P=0.003], and [56.2% (172/306) vs. 80.8% (59/73), P<0.001]. For those with a PSA value of 10-20 ng/ml, the detection rates of PCa and CsPCa in the PI-RADS 4 group were less than those in the PI-RADS 5 group [76.2% (48/63) vs. 97.3% (73/75), P<0.001], and [73.0% (46/63) vs. 90.7% (68/75), P=0.006]. There were statistically significant differences in the proportions of patients with prostate negative biopsy and those falling into WHO/ISUP grade groups 1, 2, 3, 4, or 5 (P<0.001) between the PI-RADS 4 group and the PI-RADS 5 group in both stratifications. Conclusions: In this study, the detection rates of CsPCa and PCa in the PI-RADS 4 group were less than those in the PI-RADS 5 group. With the increase of PI-RADS scores, the detection rate of high-grade PCa increased. The same results held for patients with PSA<10 ng/ml or with PSA 10-20 ng/ml.

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Introducción: El cáncer de próstata (CP) el segundo cáncer diagnosticado en hombres, con mayor incidencia a los 66 años. La obesidad, el tabaquismo, alcoholismo y antecedentes familiares de CP se han encontrado asociados al riesgo de metástasis. El objetivo del presente estudio fue medir la aso-ciación entre factores y el estado metastásico en pacientes con CP en un centro único de referencia en Ecuador. Metodología: El presente estudio analítico, se realizó en el Hospital "Teodoro Maldonado Carbo", en Guayaquil-Ecuador, en el período enero-diciembre del 2019. El cálculo muestral fue no probabilístico, tipo censo. Se incluyeron casos con CP. Las variables fueron: edad, PSA, escala de Gleason, presencia de metástasis, sintomatología, tabaquismo, obesidad y antecedentes. Se presenta Odds Ratio como medida de asociación con intervalo de confianza del 95% y valor P. Resultados: El estudio incluyó 363 pacientes, con edad promedio de 75.2 ± 9.6 años. El grupo con metástasis fue de 202 casos (55.65%). Metástasis ósea 32.5%, pulmonar 9.6%, ganglionar 8.8% y hepático 4.75%. En la sintomatología la más frecuente fue, disuria (44.4%); el 33.6% con polaquiuria, un 13.2% hematuria y 8.8% tenesmo. El estadio Gleason-9 OR=24.85 (IC 95% 1.47-419.8) P=0.0259. El nivel de PSA >19 ng/ml OR= 6.996 (IC 95% 2.68-18.29) P=0.0001. El tabaquismo OR=2.34 (IC 95% 1.52-3.60) P=0.0001. Fueron factores protectores el valor de PSA <19 ng/ml OR=0.082 (IC 95% 0.043-0.157) P<0.0001, acudir a consulta de Hipertensión arterial OR=0.33 (IC 95% 0.161-0.691) P=0.0032 y el estadío Gleason-6 OR=0.108 (IC 95% 0.0665-9.1736) P<0.0001. Conclusión: Los niveles de PSA >19 ng/ml y el estadio Gleason >9 se asocian a la presencia de metástasis en pacientes con CP.

Introduction: Prostate cancer (PC) is the second most common cancer diagnosed in men, with the highest incidence at 66 years of age. Obesity, smoking, alcoholism, and a family history of PC are associated with the risk of metastasis. This study aimed to measure the association between factors and the metastatic state in patients with PC in a single reference center in Ecuador. Methodology: This analytical study was conducted at the "Teodoro Maldonado Carbo" Hospital in Guayaquil-Ecuador, January-December 2019. The sample calculation was nonprobabilistic, census type, and cases with PC were included. The variables were age, PSA, Gleason score, presence of me-tastases, symptoms, smoking, obesity, and history. The odds ratio was used to measure the associa-tion with a 95% confidence interval and P value. Results: The study included 363 patients, with a mean age of 75.2 ± 9.6 years. The group with me-tastasis included 202 patients (55.65%). Bone metastasis 32.5%, lung 9.6%, lymph nodes 8.8%, and liver 4.75%. In the symptomatology, the most frequent were dysuria (44.4%), 33.6% with pollakiuria, 13.2% hematuria, and 8.8% tenesmus. Gleason stage-9 OR=24.85 (95% CI 1.47-419.8) P=0.0259. PSA level >19 ng/ml OR= 6.996 (95% CI 2.68-18.29) P =0.0001. Smoking OR=2.34 (95% CI 1.52-3.60) P=0.0001. Protective factors were PSA value <19 ng/ml OR=0.082 (95% CI 0.043-0.157) P<0.0001, arterial hypertension consultation OR=0.33 (95% CI 0.161-0.691) P=0.0032 and stage Gleason-6 OR=0.108 (95% CI 0.0665-9.1736) P<0.0001. Conclusión: PSA levels >19 ng/ml and Gleason stage > nine are associated with metastases in patients with PC.

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Introducción: El desarrollo de la tecnología con el ultrasonido transrectal ha permitido obtener imágenes diagnósticas de la glándula prostática; su interés deriva de la inmensa frecuencia de problemas clínicos, tanto benignos como malignos. El medio diagnóstico del cáncer de próstata se basa en una biopsia dirigida por ultrasonido transrectal en la mayoría de los casos. Objetivo: Determinar los hallazgos ultrasonográficos y su relación con estudios histopatológico en el diagnóstico de la neoplasia prostática, de los pacientes con sospecha, atendidos en la consulta de urooncología. Métodos: Se realizó un estudio descriptivo transversal en pacientes con sospecha clínica de cáncer prostático, procedentes del servicio de urología en el Hospital Celia Sánchez Manduley en el período comprendido entre julio de 2019 a julio de 2021; que acudieron a consulta con indicación de ultrasonido transrectal. El universo estuvo constituido por 105 pacientes. Se utilizaron criterios de inclusión y exclusión para la selección del universo, previo consentimiento informado de los pacientes. Las variables estudiadas fueron: edad, color de la piel, síntomas clínicos, hallazgos del ultrasonido transrectal, relación ecosonográfica- anatomopatológico. Resultados: Predominó el grupo de edad de 60 a 79 años, de la raza negra, con síntomas urinarios obstructivos bajos, con presencia del nódulo hipoecoico. Predominó la localización ultrasonográfica periférica, así como el adenocarcinoma prostático como hallazgos anatomopatológico encontrado a través de la biopsia. Conclusiones: Se demostró correlación ecográfica-histológica y anatomopatológica(AU)

Introduction: The development of transrectal ultrasound technology has made it possible to obtain diagnostic images of the prostate gland; its interest derives from the massive frequency of clinical problems, both benign and malignant. The diagnosis of prostate cancer is based on a transrectal ultrasound-guided biopsy in most cases. Objective: To determine the ultrasonographic findings and the how they relate with histopathological studies in the diagnosis of prostatic neoplasia in suspected patients treated in the uro-oncology clinic. Methods: A cross-sectional descriptive study was carried out in patients with clinical suspicion of prostate cancer, in the urology service at Celia Sánchez Manduley Hospital from July 2019 to July 2021; they attended the consultation with an indication for transrectal ultrasound. The universe consisted of 105 patients. Inclusion and exclusion criteria were used for the selection of the universe, with the prior informed consent of the patients. The variables studied were age, skin color, clinical symptoms, transrectal ultrasound findings, echosonographic-pathological relationship. Results: Predominance was observed of subjects from the age group of 60 to 79 years, black race, with lower obstructive urinary symptoms, and presence of hypoechoic nodule. Peripheral ultrasonographic location prevailed, as well as prostatic adenocarcinoma as pathological findings found through biopsy. Conclusions: Ultrasound-histological and pathological correlation was demonstrated(AU)

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Introducción: Al día de hoy no se ha alcanzado un consenso sobre el mejor enfoque para realizar el tamizaje y la detección precoz del Cáncer de Próstata (CaP), en la población. No obstante, hay programas que recomiendan la utilización de la prueba de antígeno prostático específico rápida para la detección de CaP sin un análisis de correlación frente a la prueba sérica. Objetivo: Identificar la correlación entre las pruebas de antígeno prostático específico rápida y sérica, en la población mexicana. Métodos: Se realizó un estudio descriptivo, transversal y retrospectivo, bajo un muestreo no probabilístico por conveniencia. En el período comprendido entre el 25 de mayo al 13 de julio de 2017. Se calcularon los coeficientes de correlación punto biserial (r pb ) y phi (r phi ). Resultados: Se incluyeron 1 635 registros, principalmente de la Ciudad de México y del Estado de México (n= 1 398; 85,5 por ciento, IC95 por ciento 81-89,9). La edad promedio fue de 51 años (DE= 7,68). El valor promedio de antígeno prostático sérico fue de 1,49 ng/mL (DE= 1,91). La proporción de hombres con una prueba rápida positiva (n=60; 3,7 por ciento; IC95 por ciento 2,9-4,6) fue menor (p= 0,0415) en comparación con la proporción de pacientes con una prueba sérica ≥ 4 ng/mL (n=85; 5,2 por ciento; IC95 por ciento 4,1-6,3). El número de casos dobles negativos fue de 1 530 (93,6 por ciento; IC95 por ciento 92,3-94,6) y de dobles positivos fue de 40 (2,4 por ciento; IC95 por ciento1,7-3,2). Los coeficientes de correlación punto biserial y phi mostraron una correlación baja entre la prueba rápida y la prueba sérica de antígeno prostático (rpb= 0,469; p < 0,001; r2= 0,2199 y r ph i= 0,540; p < 0,001; r2= 0,2916). Conclusiones: La prueba de antígeno prostático específico rápida es una herramienta conveniente para los programas de detección de alteración prostática en unidades médicas del primer nivel de atención, donde la prueba sérica no se puede realizar, al ser una prueba con una baja sensibilidad y con un bajo coeficiente de correlación respecto de la prueba de antígeno prostático específico sérica, esto es un punto importante que debe considerarse al diseñar programas de detección oportuna de cáncer de próstata(AU)

Introduction: To date, no consensus has been reached on the best approach for screening and early detection of Prostate Cancer (PCa) in the population. However, there are programs recommending the use of the rapid prostate-specific antigen test for the detection of PCa without a correlation analysis versus the serum test. Objective: To identify the correlation between rapid and serum prostate specific antigen tests in the Mexican population. Methods: A descriptive, cross-sectional and retrospective study was carried out, under a non-probabilistic convenience sampling from May 25 to July 13, 2017. The correlation coefficients of point biserial (rpb) and phi (rphi) were calculated. Results: One thousand six hundred thirty five (1,635) records were included, mainly from Mexico City and the State of Mexico (n= 1,398; 85.5 percent, 95 percent CI 81-89.9). The average age was 51 years (SD= 7.68). The mean value of serum prostate antigen was 1.49 ng/ml (SD= 1.91). The proportion of men with positive rapid test (n=60; 3.7 percent; 95 percent CI 2.9-4.6) was lower (p= 0.0415) compared to the proportion of patients with a serum test ≥ 4 ng/ml (n= 85; 5.2 percent; 95 percent CI 4.1-6.3). The number of double negative cases was 1,530 (93.6 percent; CI95 percent 92.3-94.6) and of double positives was 40 (2.4 percent; CI95 percent 1.7-3.2). The point biserial and phi correlation coefficients showed low correlation between the rapid test and the serum prostate antigen test (rpb= 0.469; p < 0.001; r2= 0.2199 and rphi= 0.540; p < 0.001; r2= 0. 2916). Conclusions: The rapid prostate-specific antigen test is a convenient tool for prostatic alteration detection programs in primary care medical units, where the serum test cannot be performed, however, as it is a test with low sensitivity and with low correlation coefficient with respect to serum prostate-specific antigen testing, this is an important point to consider when designing prostate cancer early detection programs(AU)

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Resumen El antígeno prostático específico (PSA) en circulación se encuentra ligado a la alfa-1-quimiotripsina y una pequeña fracción circula de manera libre (PSAl). Se valoró la utilidad clínica del PSA total (PSAt) y el índice de PSA libre para la detección de cáncer prostático en pacientes asintomáticos. Se cuantificó el PSAt, el PSAl y el índice de PSAl en 364 pacientes estratificados por grupo de edad. La frecuencia de valores anormales de PSAt fue del 8,79% (32/364). El grupo de 50-59 años presentó la mayor incidencia de resultados anormales (19/32). No hubo diferencia estadísticamente significativa entre PSAt y el índice de PSAl (p<0,05). El índice PSAl puede potencializar el valor del PSAt para determinar la presencia o ausencia de cáncer prostático. Un índice superior a 0,24 ng/mL puede ayudar a evitar o posponer la indicación de biopsia, principalmente cuando los valores de PSAt están entre 4 y 10 ng/mL.

Abstract Circulating prostate-specific antigen (PSA) is bound to alpha-1-chymotrypsin and a small fraction is free (PSAl). The clinical utility of the total PSA (PSAt) and the PSAl index for prostate cancer screening in asymptomatic patients was assessed. PSAt, PSAl and the PSAl index were quantified in 364 patients stratified by age group. The frequency of abnormal PSAt values was 8.79% (32/364). The 50-59 year-old group presented the highest incidence of abnormal results (19/32). There was no statistically significant difference between PSAt and the PSAl index (p<0.05). The PSAl index can potentiate the PSAt value to determine the presence or absence of prostate cancer. An index greater than 0.24 ng/mL can help to avoid or postpone the indication for a biopsy, especially when the PSAt values are between 4 and 10 ng/mL.

Resumo O antígeno prostático específico (PSA) em circulação é ligado à alfa-1-quimotripsina e a uma pequena fração circula livremente (PSAl). A utilidade clínica do PSA total (PSAt) e do índice de PSAl livre para o rastreamento do câncer de próstata em pacientes assintomáticos foi avaliada. PSAt, PSAl e o índice de PSAl foram quantificados em 364 pacientes estratificados por faixa etária. A frequência de valores anormais de PSAt foi de 8,79% (32/364). O grupo de 50-59 anos apresentou a maior incidência de resultados anormais (19/32). Não houve diferença estatisticamente significativa entre o PSAt e o índice PSAl (p<0,05). O índice PSAl pode potencializar o valor do PSAt para determinar a presença ou ausência de câncer de próstata. Um índice superior a 0,24 ng/mL pode ajudar a evitar ou adiar a indicação de biópsia, principalmente quando os valores de PSAt estão entre 4 e 10 ng/mL.