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Piotr Chlosta has a total of 250 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Open Access

    Age Does Not Independently Predict Biochemical Recurrence in Prostate Cancer Following Radical Prostatectomy: A Comparative Analysis of 4223 pT2N0R0 Patients

    by Mehdi Kardoust Parizi, Pierre I. Karakiewicz, Piotr Chlosta, Peter Nyirády, Tamás Fazekas, Pawel Rajwa, Shahrokh F. Shariat

    Background: Whether younger age independently predicts biochemical recurrence (BCR) after radical prostatectomy (RP) remains controversial because previous studies have included heterogeneous pathological stages and treatment populations. We aimed to determine whether age independently predicts BCR following RP in patients with organ‐confined, node‐negative, margin‐negative (pT2N0R0) prostate cancer. Methods: We performed a retrospective multicenter cohort study of 4223 patients with pT2N0R0 prostate cancer treated with RP. Patients were stratified into ≤ 55 years ( n = 875; including 223 aged < 50 years) and > 55 years ( n = 3348). BCR was defined as a confirmed prostate‐specific antigen level ≥ 0.2 ng/mL. Kaplan–Meier analyses, multivariable Cox regression, restricted cubic spline modeling, subgroup analyses, and sensitivity analyses were performed. Results: Younger patients had lower PSA levels, lower Grade Group, and lower crude BCR rates than older patients (3.8% vs. 5.9%; p = 0.018). However, younger age was not independently associated with BCR after adjustment for clinicopathological variables (hazard ratio 0.52, 95% confidence interval 0.26–1.04; p = 0.075). Higher PSA and Grade Group 3–5 independently predicted recurrence (all p < 0.05). Age analyzed continuously, alternative age thresholds, restricted cubic spline modeling, and subgroup analyses consistently demonstrated no significant association between age and BCR. Limitations include the retrospective design, relatively short follow‐up, and use of BCR as a surrogate endpoint. Conclusions: Among men with pT2N0R0 prostate cancer treated with RP, age was not a statistically significant independent predictor of BCR, although a clinically meaningful effect cannot be excluded. Postoperative risk stratification should rely on established pathological factors rather than age alone.

  • Open Access

    Impact of Gleason Grade at the Positive Surgical Margin on Biochemical Recurrence After Radical Prostatectomy in pT2N0 Prostate Cancer

    by Mehdi Kardoust Parizi, Akihiro Matsukawa, Ichiro Tsuboi, Pawel Rajwa, Stephan Korn, Heidemarie Ofner, Pierre I. Karakiewicz, Leonardo Oliveira Reis, Marcin Miszczyk, Nicolai Huebner, et al.

  • Open Access

    Pretreatment NPLH as a Potential Predictor of Pathologic Complete Response to Accelerated MVAC Neoadjuvant Chemotherapy in Muscle-Invasive Bladder Cancer: Comparison with NLR and PLR

    by Łukasz Kwinta, Kamil Konopka, Krzysztof Okoń, Mateusz Łobacz, Maciej Lubaś, Piotr Chłosta, Przemysław Dudek, Piotr J. Wysocki

    Background. Accurate prediction of pathologic complete response (pCR) to neoadjuvant chemotherapy (NAC) in muscle-invasive urothelial bladder cancer (MIBC) remains an unmet clinical need. The neutrophil-to-platelet/hemoglobin-to-lymphocyte (NPLH) ratio, a composite hematologic index that reflects both systemic inflammation and nutritional oxygen-carrying capacity, has not been previously evaluated as a predictor of NAC response in this setting. Methods. We retrospectively analyzed 114 consecutive patients with MIBC (cT2–T4, N0–N3) who received accelerated MVAC (aMVAC) NAC followed by radical cystectomy at a single academic center. Pretreatment NPLH (calculated as [neutrophils × platelets]/[hemoglobin × lymphocytes]) was assessed as a predictor of pCR (ypT0N0) and tumor regression grade (TRG). Receiver operating characteristic (ROC) curve analysis, Mann–Whitney U test, and logistic regression were used. NPLH performance was compared to NLR and PLR. Results. pCR was achieved in 35 patients (30.7%). Median NPLH was significantly lower in pCR vs. non-pCR patients (33.9 [IQR 23.1–42.4] vs. 47.6 [IQR 30.7–90.4]; p = 0.0007). NPLH yielded an AUC of 0.700 (bootstrap 95% CI 0.596–0.794) for pCR prediction, numerically superior to NLR (AUC 0.645 [0.542–0.741]) and PLR (AUC 0.643 [0.533–0.747]); DeLong test: NPLH vs. NLR p = 0.079, NPLH vs. PLR p = 0.090. At the optimal cut-off of 44.5, NPLH demonstrated 80.0% sensitivity and 57.0% specificity. pCR rates declined progressively across NPLH quartiles: 48.3% (Q1) to 10.3% (Q4). On multivariate logistic regression, log-transformed NPLH was the only independent predictor of pCR (parsimonious model, OR 0.292, 95% CI 0.131–0.652; p = 0.003; EPV = 17.5). A positive correlation was observed between NPLH and TRG score (Spearman r = 0.284; p = 0.0022), with significant differences between TRG 1 and TRG 3 subgroups (p = 0.0036). Conclusions. Pretreatment NPLH is an independent predictor of pCR to aMVAC in MIBC and is numerically superior to NLR and PLR (DeLong p = 0.079). Consisting exclusively of standard complete blood count parameters, NPLH is readily available and inexpensive. This single-center exploratory study is hypothesis-generating and requires prospective external validation before clinical implementation.

  • Open Access

    Impact of Fixed-Dose Combination Versus Single-Component Therapy for Benign Prostatic Hyperplasia-Related Urinary Symptoms on Persistence, Adherence, and Satisfaction in a Real-Life Setting

    by Mateusz Małkowski, Anna Chudek, Agnieszka Almgren-Rachtan, Jerzy Tadeusz Chudek, Piotr Ludwik Chłosta

    Background: Fixed-dose combination medications (FDCs) are recognized methods of increasing adherence to polytherapy in chronic diseases. However, the role of FDCs in patients with benign prostatic hyperplasia (BPH) associated with lower urinary tract symptoms (LUTS) remains uncertain. We designed this study to assess persistence, adherence, and patient satisfaction with FDCs recently introduced to the Polish pharmaceutical market, which contain tamsulosin (an α1-adrenergic receptor antagonist) in combination with solifenacin (a muscarinic receptor antagonist) or dutasteride (a 5-α reductase inhibitor). Methods: The analysis included 50,435 men (67.8 ± 8.8 years old) managed by urologists for BPH-associated LUTS, who had been on combination therapies for at least 3 months. Two study visits, with an interval of 2.1 ± 1.4 months, were conducted between February and December 2024. Results: Single-component drugs (83.1%) were more common forms of therapy compared to FDCs (16.9%). ARAs (α1-adrenergic receptor antagonists) with 5-α reductase inhibitors comprised 70.2%, while ARAs with muscarinic receptor antagonists or β3-adrenergic agonists comprised 29.5%. Persistence with therapy across two visits was 82.0% for single-component drugs and 93.6% for FDCs (p < 0.001); OR = 1.31 (95% CI: 1.02–1.63). Similarly, adherence was better in patients treated with FDCs (96.6% vs. 91.0% at visit 1, p < 0.001; 99.3% vs. 97.9% at visit 2, p < 0.05). Patients prescribed FDCs were satisfied with therapy more often than those prescribed single-component drugs (62.6% and 76.8% vs. 50.6% and 67.5% at visits 1 and 2, respectively; p < 0.001). Conclusions: 1. Combination therapies are still more commonly administered as separate tablets than FDCs in patients with BPH-associated LUTS. 2. The use of FDCs increases short-term satisfaction and persistence with therapy, with a mild effect on adherence.


  • Open Access

    Neoadjuvant Accelerated Methotrexate, Vinblastine, Doxorubicin, and Cisplatin Chemotherapy for Muscle-Invasive Urothelial Cancer: Large, Single-Center Analysis of Consecutive Patients’ Data

    by Łukasz Kwinta, Kamil Konopka, Krzysztof Okoń, Mateusz Łobacz, Piotr Chłosta, Przemysław Dudek, Anna Buda-Nowak, Paweł Potocki, Piotr J. Wysocki

    Background/Objectives: Bladder cancer is a significant clinical problem with approximately 500,000 new cases worldwide annually. In approximately 25% of cases, disease is diagnosed at a stage of invasion of the muscle layer of the bladder. The current standard approach in this disease is preoperative chemotherapy followed by radical cystectomy. Dose-dense MVAC (ddMVAC), a two-day chemotherapy regimen, is the reference treatment protocol in this setting. The presented study evaluated the effectiveness and safety of accelerated MVAC (aMVAC) chemotherapy—a one-day regimen given before the resection of the bladder due to muscle-invasive disease. Methods: A retrospective analysis included 119 consecutive patients diagnosed with urothelial muscle-invasive bladder cancer (MIBC) who underwent preoperative chemotherapy with the aMVAC regimen. The planned treatment included 4–6 cycles of preoperative chemotherapy. The analysis of the degree of histopathological response to treatment was based on the three-grade TRG (tumor regression grade) classification. Results: A complete pathological response (TRG1) was observed in 44 patients (36.7%), and a major pathologic response (p = 0.00118). Patients who received at least 4 cycles (compared to ≤3 cycles) of neoadjuvant chemotherapy had a significantly higher chance of achieving a pathological response (partial or complete) to treatment (78.1% vs. 52.2%, RR 0.68, p = 0.0374). Administration of at least five cycles of chemotherapy was associated (compared to four cycles) with a significantly higher likelihood of achieving a complete pathological response (63.2% vs. 33.8%, RR = 1.71, p = 0.0221). The vast majority of adverse events were in grades 1 and 2, according to CTCAE version 5.0. Only five patients experienced grade 3–4 toxicities. The most common adverse event was anemia, which occurred in 66.3% of patients. Conclusions: Our real-world data analysis confirms the activity, safety, and feasibility of the aMVAC regimen as neoadjuvant chemotherapy in patients with urothelial MIBC.


  • Open Access

    An Updated Systematic Review and Network Meta-Analysis of First-Line Triplet vs. Doublet Therapies for Metastatic Hormone-Sensitive Prostate Cancer

    by Akihiro Matsukawa, Giulio Litterio, Angelo Cormio, Marcin Miszczyk, Mehdi Kardoust Parizi, Tamás Fazekas, Ichiro Tsuboi, Stefano Mancon, Robert J. Schulz, Ekaterina Laukhtina, et al.

    Purpose: The addition of androgen receptor pathway inhibitors (ARPIs) to androgen deprivation therapy (ADT), with or without docetaxel (Doc), is currently recommended for metastatic, hormone-sensitive prostate cancer (mHSPC). Recently, the ARANOTE trial evaluated the efficacy and safety of Darolutamide + ADT in this setting. We aimed to update a network meta-analysis (NMA) of these combination therapies. Methods: We conducted a systematic search for RCTs on systemic therapies for mHSPC using MEDLINE, Embase, and the Web of Science Core Collection in September 2024. An NMA utilizing random-effects models was performed to compare progression-free survival (PFS), overall survival (OS), and adverse event (AE) incidence (PROSPERO: CRD42024591458). Results: A total of 12 RCTs (n = 11,954) were included in our NMAs. Triplet therapies were associated with significant improvements in PFS compared to ARPI-based doublet therapies (hazard ratio [HR]: 0.74; 95% confidence interval [CI]: 0.59–0.93; p = 0.01), but the difference did not reach the conventional levels of statistical significance for OS (HR: 0.82; 95% CI: 0.67–1.01; p = 0.059). In a subset analysis, compared to ARPI-based doublet therapies, triplet therapies showed a significant improvement in PFS in patients with high-volume disease (HR: 0.64; 95% CI: 0.47–0.88; p < 0.01), whereas no significant improvement was observed in those with low-volume disease (HR: 0.86; 95% CI: 0.45–1.67; p = 0.7). No significant difference in grade ≥ 3 AEs was observed between triplet therapies and ARPI-based doublet therapies. The main limitations include patient heterogeneity and limited follow-up in some studies. Conclusions: Triplet therapies can improve the oncologic outcomes of patients with mHSPC compared to ARPI-based doublet therapies, without significantly increasing severe AEs. These findings warrant further confirmation in a head-to-head trial powered for overall survival.


  • Open Access

    Lower Urinary Tract Symptoms Correlate with Erectile Dysfunction and Premature Ejaculation but Not with Men’s Sexual Activity: Results from a Large Population-Representative Study

    by Mikolaj Przydacz, Pawel Rajwa, Sabrina De Cillis, Cyrille Guillot-Tantay, Francois Herve, Antonio Tienza Fernandez, Manuela Tutolo, Mehmet Gokhan Culha, Paolo Geretto, Chen Shenhar, et al.

    Background: Lower urinary tract symptoms (LUTS) contribute to erectile dysfunction (ED) and premature ejaculation (PE). However, only a few studies have been conducted with representative groups of men that had well-balanced demographic characteristics. Thus, we aimed to confirm the effect of LUTS on ED and PE and to analyze the association between LUTS and men’s sexual activity in a large representative cohort. In addition, we evaluated the sex-specific and overall quality of life of men who had LUTS with either ED or PE. Methods: We used the latest census and estimated the sample size to build a group of men representative of the population. LUTS, ED, and PE were evaluated with reliable instruments. Regression models were used to analyze the data. Results: All included men were representative in relation to their age and residential location (n = 3001). ED and PE were more common in men who reported LUTS compared with men who did not have LUTS (p < 0.001). Age, comorbidity, and lifestyle did not affect the negative effect of LUTS on ED or PE (regression coefficients of 0.159 and 0.528 for ED and PE, respectively, p < 0.001). However, regression models did not validate the impact of LUTS on sexual activity, defined by intercourse frequency and number of sexual partners (odds ratio of 0.981, CI 0.961–1.001, p = 0.061). Nevertheless, men with LUTS and either ED or PE had worse quality of sexual life and general quality of life compared with the remaining respondents. Conclusion: LUTS worsened ED and PE but had no impact on men’s sexual activity. Our findings confirm the recommendations to assess for LUTS in men reporting ED or PE. Clinical Trial Registration: The study was registered with ClinicalTrials.gov (NCT05462171).


  • Open Access

    Robot-Assisted Surgery in Poland: The Past, the Present, and the Perspectives for the Future

    by Roman Sosnowski, Krzysztof Jakubiak, Hubert Kamecki, Grzegorz Kade, Tomasz Drewa, Tomasz Szydełko, Piotr Chłosta, Piotr Kania, Piotr Jarzemski

    In recent decades, we have been witnessing a technological revolution in the area of minimally invasive urologic surgery, with robot-assisted surgery being one of the most game-changing inventions


  • Open Access

    Sexual activity in a large representative cohort of Polish men: Frequency, number of partners, correlates, and quality of life

    by Mikolaj Przydacz, Marcin Chlosta, Adrian Andrzej Chrobak, Pawel Rajwa, Przemyslaw Dudek, Tomasz Wiatr, Katarzyna Gronostaj, Anna Katarzyna Czech, Marcin Miszczyk, Michal Skalski, et al.

    Introduction: Sexual activity of men has been evaluated at the population-level in different regions of the world. However, reliable data are lacking for Eastern Europe. Therefore, the aim of this study was to analyze the frequency of sexual activity and the number of sexual partners in a large representative cohort of Polish men. Methods: We performed a cross-sectional investigation with computer-assisted web interviews. Participants were stratified by age (≥18 years) and place of residence. The most recent population census was used to produce a population-representative sample of respondents. Men’s sexual activity was then correlated with multiple variables. Results: We enrolled 3001 men, representative for age and place of residence, including adequate proportions of respondents from urban and rural areas. Most Polish men were sexually active, predominantly having had sex at least weekly with one partner. Almost 18% of respondents declined sexual intercourse and/or sexual partner in the prior year. The highest sexual activity was observed for men 35-44-years-old (for sex frequency) and 18-24-years-old (for partner number), living in medium-sized cities, employed, and married (for sex frequency) or divorced (for partner number). Erectile dysfunction negatively affected the frequency of sexual activity and lowered the number of sexual partners, although premature ejaculation did not have any effect. Frequency of sexual activity and number of sexual partners correlated well with psychological distress, quality of sex life, and overall life quality. Whereas lifestyle habits including smoking and alcohol intake decreased the likelihood of sexual activity, all analyzed comorbidities did not affect sex life. Conclusions: This study of men’s sexual activity was the first population-representative and nationwide investigation performed in Poland. Most Polish men were sexually active and sexual activity correlated with multiple variables including sociodemographic factors, erectile functioning, mental distress, overall and sex-specific quality of life, and lifestyle habits.


  • Open Access

    Regular and Irregular Use and Reasons for Discontinuation of Solifenacin Therapy in Patients with Overactive Bladder Managed by Urologists

    by Mateusz Małkowski, Agnieszka Almgren-Rachtan, Magdalena Olszanecka-Glinianowicz, Jerzy Chudek, Piotr Chłosta

    Solifenacin, a selective muscarinic receptor antagonist, is one of the best-tolerated and most effective medicines that relieve storage symptoms in patients with an overactive bladder (OAB). However, the persistence of solifenacin in daily clinical practice remains far below that reported in clinical trials. This study aimed to analyze the adherence of patients to the therapy and the reasons for solifenacin discontinuation and non-regular use in OAB patients managed by urologists. Data concerning non-compliance and the discontinuation of solifenacin, along with the reasons, were collected during two consecutive visits for 64,049 OAB outpatients. Over the two visits, 81.6% of the patients continued therapy, and 88.6% were taking solifenacin regularly. An age ≥ 75 yrs., the male sex, a rural or small-city dwelling, and a prescription of ≥10 mg predicted therapy continuation. The female sex, a higher education, a short or long duration of an OAB, and a non-idiopathic OAB predicted regular use. The persistence of nycturia and urinary incontinence during therapy predicted both discontinuation and non-regular use. Dissatisfaction with therapy was the most frequent reason for discontinuation. In conclusion, an initial prescription of solifenacin at a low dose reduces the chance of OAB symptom improvement and results in more frequent discontinuation. A high rate of discontinuation related to dissatisfaction suggests unrealistic expectations for OAB patients and insufficient education by urologists.