Publications by authors named "Gustavo C Lemos"

Objectives: To evaluate the role of salvage local treatment in managing recurrent PCa following FT, focusing on oncological and functional outcomes.

Methods: A systematic review and meta-analysis were performed following the PRISMA framework. A comprehensive literature search using the PubMed/MEDLINE and EMBASE databases was performed until July 2023.

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Article Synopsis
  • The study evaluated the early experiences of a high-volume surgeon using the Hugo RAS platform for 30 urological surgeries, focusing on the challenges of trocar placement, docking angles, and surgical times.
  • Significant results showed that surgical times were consistent with other techniques, with low blood loss and minimal complications; nearly all patients retained sexual function post-surgery.
  • The conclusion highlighted that the implementation of the Hugo RAS system is safe with a motivated team, but required adjustments for optimal operation, particularly concerning ergonomics and positioning.
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Purpose: To compare biochemical recurrence, sexual potency and urinary continence outcomes of ablative therapy and radical treatment (radical prostatectomy or radiotherapy with androgen deprivation therapy).

Material And Methods: A systematic review and meta-analysis followed the PRISMA guidelines were performed. We searched MEDLINE/PubMed.

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Introduction: Historically, therapeutic avenues for patients with clinical stage II seminoma germ cell tumors (SGCT) were confined to radiotherapy and chemotherapy. While survival rates with these modalities are commendable, both entail substantial long-term morbidities. Furthermore, this youthful patient cohort exhibits elevated rates of secondary malignancies, surfacing decades post-successful primary cancer treatment (1).

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Introduction And Hypothesis: Pelvic organ prolapse (POP) is caused by an imbalance in the stability of the pelvic organs, resulting in loss of support. The most common types of POP, anterior and apical, are associated with lower urinary tract symptoms (LUTS) such as bladder outlet obstruction and detrusor overactivity (DO). Vaginal surgery may improve LUTS and overall urinary symptoms.

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Introduction: To evaluate the possible effects of the coronavirus disease 2019 (COVID-19) pandemic on the oncologic results of patients with prostate cancer regarding clinical staging, presence of adverse pathological outcomes, and perioperative complications.

Materials And Methods: This retrospective study included patients who underwent radical prostatectomy. The time between biopsy and surgery, staging tests, final histopathological evaluation after surgery, lymphadenectomy rate, postoperative complications, and prostatic specific antigen (PSA) levels (initial and 30 days after surgery) were analyzed and compared in a group of patients before and during the pandemic period.

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Article Synopsis
  • The study aimed to analyze public health services for radical prostatectomy by comparing academic versus non-academic hospitals and varying surgery volumes in São Paulo.* -
  • Data gathered from 11,259 surgeries between 2008 and 2018 revealed that although intensive care unit stay and mortality rates were similar across different hospitals, academic centers had shorter hospital stays.* -
  • High-volume hospitals had significantly higher costs of hospitalization compared to low and intermediate-volume centers, indicating a trade-off between volume and cost efficiency.*
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Introduction: Non-metastatic, castration-resistant prostate cancer (nmCRPC) is an important clinical stage of prostate cancer, prior to morbidity and mortality from clinical metastases. In particular, the introduction of novel androgen-receptor signaling inhibitors (ARSi) has changed the therapeutic landscape in nmCRPC. Given recent developments in this field, we update our recommendations for the management of nmCRPC.

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Background: The aim of this study was to evaluate the current role of local treatment in prostate cancer with a low metastatic burden (or oligometastatic) in relation to survival and safety.

Methods: We performed a meta-analysis of studies published in the MEDLINE, EMBASE, and Cochrane databases until December 2021. Studies comparing local and nonlocal treatment in patients with metastatic prostate cancer were included.

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Introduction: We aimed to evaluate the role of remote proctoring during the initial training phases of a robotics curriculum using surgical robot skills simulator exercises.

Materials And Methods: Prospective randomized study comprising 36 urology residents and junior staff urologists without previous robotic training. Group 1 (G1) performed exercises without any assistance or support, group 2 (G2) received support from in-person proctor, and group 3 (G3) from a remote proctor through a telementoring system.

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  • The study examines adrenalectomy outcomes in São Paulo's public health system from 2008 to 2019, focusing on surgery numbers, mortality rates, and hospital stay durations.
  • A total of 943 adrenalectomies were conducted, with mortality rates being 0% in low-volume hospitals, 0.015% in intermediate-volume, and 0.004% in high-volume hospitals, indicating overall low mortality.
  • While there were no statistically significant differences in mortality rates among surgical volume groups, high-volume hospitals showed a shorter average ICU stay than intermediate-volume centers.
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  • The study compared outcomes and indirect costs of radical nephrectomies (RN) and partial nephrectomies (PN) in São Paulo's public hospitals from 2008 to 2019.
  • Overall mortality rates were lower for PN (0.41%) compared to RN (2.87%), and hospital stays were longer in low-volume hospitals for both types of surgeries.
  • High-volume hospitals and those with urology residency programs had significantly shorter hospital stays for RN, highlighting the impact of surgical volumes on patient outcomes.
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Objective: To describe and compare the number of surgeries, mortality rate, length of hospital stay, and costs of transurethral resection of the prostate and open prostatectomy for the treatment of benign prostatic hyperplasia, between 2008 and 2018, in the Public Health System in São Paulo, Brazil.

Methods: Ecological and retrospective study using data from the informatics department of the Brazilian Public Health System database. Procedure codes were "open prostatectomy" and "transurethral resection of the prostate.

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Background: Active surveillance (AS) is the preferred treatment for patients with very low-and low-risk prostate cancer (PCa), but it is underperformed worldwide. This study aimed to report knowledge, attitudes, and practices (KAP) of AS for PCa among urologists in Brazil.

Methods: This cross-sectional study used a questionnaire with 50 questions divided into participant characteristics, knowledge regarding inclusion criteria for AS, follow-up, intervention triggers, acceptance, and practice for an index patient.

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Objective: To evaluate the predictive value of positron emission computed tomography or magnetic resonance (PET-CT and PET-MRI) using gallium-68-labeled prostate-specific membrane antigen (68Ga-PSMA) in lymph node involvement in prostate cancer.

Methods: A retrospective study comprising 91 patients diagnosed with prostate cancer between 2016 to 2020, who underwent 68Ga-PSMA PET-CT or PET-MRI for staging before prostatectomy. The patients were divided into Group 1, with 65 patients with satisfactory pathological lymph node analysis, and Group 2, with 91 patients representing the sum of patients with pathological lymph node analysis and those with postoperative prostate-specific antigen within 60 days after surgery.

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Introduction And Hypothesis: Pelvic organ prolapse (POP) is a defect of the female pelvic floor. Stress urinary incontinence (SUI), urge urinary incontinence (UUI), and obstructive symptoms may occur in these patients. The objective of surgical treatment is to restore the anatomy and function of the pelvic floor; however, it may prompt urinary symptoms not present previously.

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Purpose: To generate and present survey results on important issues relevant to treatment and follow-up of localized and locally advanced, high-risk prostate cancer (PCa) focusing on developing countries.

Methods: A panel of 99 PCa experts developed more than 300 survey questions of which 67 questions concern the main areas of interest of this article: treatment and follow-up of localized and locally advanced, high-risk PCa in developing countries. A larger panel of 99 international multidisciplinary cancer experts voted on these questions to create the recommendations for treatment and follow-up of localized and locally advanced, high-risk PCa in areas of limited resources discussed in this article.

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Radical prostatectomy is a commonly adopted treatment for localized/locally advanced prostate cancer in men with a life expectancy of ten years or more. Robotic-assisted radical prostatectomy (RARP) is comparable to open radical prostatectomy on cancer control and complication rates; however, new evidence suggests that RARP may have better functional outcomes, especially with respect to urinary incontinence and erectile dysfunction. Some of the surgical steps of RARP are not adequately described in published literature and, as such, may have an impact on the final outcomes of the procedure.

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Purpose: To evaluate the cost-effectiveness of percutaneous cryoablation (PCA) versus robot-assisted partial nephrectomy (RPN) in patients with small renal tumors (T1a stage), considering perioperative complications.

Materials And Methods: Retrospective study from November 2008 to April 2017 of 122 patients with a T1a renal mass who after being analyzed by a multidisciplinary board underwent to PCA (59 patients) or RPN (63 patients). Hospital costs in US dollars, and clinical and tumor data were compared.

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Background: The Expanded Prostate Index Composite for Clinical Practice (EPIC-CP) is a short version of the original EPIC, developed to facilitate the instrument's use in routine care. This study aimed to validate the EPIC-CP Portuguese version, and evaluate its role in presenting early functional outcomes of surgically treated prostate cancer patients at a Latin American referral center.

Methods: The EPIC-CP was self-administered prospectively and individually by all localized prostate cancer patients, before and after robotic-assisted radical prostatectomy, from March 2017 to June 2018 at a single institution.

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Introduction: Recent data suggest that robotic platform has become the most accessible minimal invasive surgery even for surgeons without previous training in laparoscopy. Laparoscopic partial nephrectomy (LPN) is a well-stablished procedure, however, with high level of complexity and long learning curve that limit its use.

Objective: To describe safety, efficiency and learning curve of a single surgeon without previous experience in LPN to reach "TRIFECTA" at robot-assisted partial nephrectomy (RAPN).

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Background: Use of transrectal ultrasound (US)-guided biopsies improved diagnosis and treatment for patients with high prostate-specific antigen (PSA) or abnormal digital rectal exam (DRE).

Purpose: To investigate whether taking two transition zone (TZ) biopsies in addition to routine prostate double-sextant biopsies (12-cores) would improve detection rates of prostate cancer (PCa).

Material And Methods: A retrospective analysis of 1107 in a single institution database after Institutional Review Board approval, which underwent US-guided prostate biopsies from January 2014 to June 2016.

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Background: The positron emission tomography (PET) ligand Ga-Glu-urea-Lys(Ahx)-HBED-CC (Ga-PSMA-11) targets the prostate-specific membrane antigen (PSMA), upregulated in prostate cancer cells. Although Ga-PSMA-11 PET is widely used in research and clinical practice, full kinetic modeling has not yet been reported nor have simplified methods for quantification been validated. The aims of our study were to quantify Ga-PSMA-11 uptake in primary prostate cancer patients using compartmental modeling with arterial blood sampling and to validate the use of standardized uptake values (SUV) and image-derived blood for quantification.

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Introduction: To evaluate the clinical dilemma of men with surgical indication due to benign prostatic enlargement (BPE) and concomitant elevated PSA, we analysed if multiparametric magnetic resonance imaging (mpMRI) could safely prescind the prostate biopsy.

Methods: Forty men with surgical indication due to BPE and concomitantly elevated PSA levels were prospectively enrolled and retrospectively analysed. All patients underwent 1.

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Background: The three-way indwelling urinary catheter (IUC) is used for continuous bladder irrigation and is considered the cornerstone for clinical treatment of patients with macroscopic hematuria. Although there seems to be a logical relationship between catheter size and efficacy of irrigation and drainage, we often observe relevant variations in these parameters between different brands of catheters available on the market. The aim of this study was to compare the mechanical properties of different models of latex and silicone three-way catheters in an setting that resembles clinical use.

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