Publications by authors named "Fatih Gokalp"

Purpose: To compare the oncological outcomes of clear cell RCC (ccRCC), which is common in renal cell carcinomas (RCC), and chromophobic RCC (chRCC), which is less common, and to define the factors affecting survival in the Turkish patient population for both RCC subclassifications.

Materials And Methods: Patients with a pathologically confirmed RCC diagnosis after radical or partial nephrectomy in the Turkish Urooncology Association (TUOA), Urological Cancers Database-Kidney (UroCaD-K), were retrospectively reviewed. Patients with ccRCC and chRCC were included in the study.

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  • Non-obstructive azoospermia (NOA) is a prevalent and complex issue with varied treatment options and no definitive guidelines, leading to differing management practices internationally.
  • A comprehensive survey with 336 responses from specialists in 49 countries explored current medical and surgical strategies for NOA, analyzing results against existing guidelines and offering expert recommendations.
  • Key findings included diverse approaches to hormonal therapy, significant variation in sperm retrieval success rates, and differing protocols around varicocele repair and follicle-stimulating hormone cutoff levels for sperm retrieval.
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  • * Conducted from July to September 2022, a questionnaire gathered responses from 367 doctors in 49 countries, focusing on how they diagnose NOA through methods like hormone tests and genetic analyses.
  • * The survey identified that while many practices align with guidelines, significant differences in approaches were found, underscoring the need for standardized, evidence-based international guidelines for NOA evaluation.
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  • The meta-analysis investigates the effects of varicocele repair on semen parameters in infertile males, combining data from diverse studies without language restrictions.
  • A total of 351 studies were analyzed, revealing significant improvements in several semen parameters post-repair, including semen volume, sperm concentration, total sperm count, motility, and morphology, while sperm vitality showed no improvement.
  • This research is the largest of its kind and highlights the benefits of varicocele repair for male infertility, contributing valuable insights for clinical practice.
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Objectives: To compare overall survival (OS), recurrence free survival (RFS), and cancer-specific survival (CSS) in the long-term follow-up of T1 and T2 clear-cell-Renal Cell Carcinoma (ccRCC) and papillary Renal Cell Carcinoma (pRCC) patients, as well as to determine the risk factors for recurrence and overall mortality.

Material And Method: Data of patients with kidney tumors obtained from the Urologic Cancer Database - Kidney (UroCaD-K) of Turkish Urooncology Association (TUOA) were evaluated retrospectively. Out of them, patients who had pathological T1-T2 ccRCC and pRCC were included in the study.

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  • The study investigates global practices for managing sperm DNA fragmentation (SDF) in infertile men, highlighting its impact on fertility and assisted reproductive technology (ART).
  • A survey collecting data from 436 reproductive experts across 55 countries revealed a common recommendation for lifestyle changes and antioxidants, with varying durations for treatment and differing management approaches for specific infertility cases.
  • The findings indicate a lack of uniformity in practices, emphasizing the need for standardized guidelines and expert consensus for treating men with elevated SDF.
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  • The study explores global practices for sperm DNA fragmentation (SDF) testing in infertile men, following its inclusion in the WHO laboratory manual.
  • A survey conducted among 436 infertility clinicians across 55 countries reveals varied testing practices, with many testing SDF in cases of unexplained infertility, recurrent pregnancy loss, and among smokers.
  • The findings highlight the need for clearer professional guidelines on SDF testing, given the diversity in current practices and the potential benefits for certain patient populations.
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Purpose: We aimed to compare oncological outcomes in the two rare subtypes, unclassified renal cell cancer (unRCC) and translocation RCC (tRCC), vs clear cell RCC (ccRCC).

Materials And Methods: Between 2004 and 2019, from Turkish Urooncology Society Database, we identified 2324 patients for histological subtypes including 80 unRCC (3.4%), 19 tRCC (0.

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Purpose: Varicocele is a common problem among infertile men. Varicocele repair (VR) is frequently performed to improve semen parameters and the chances of pregnancy. However, there is a lack of consensus about the diagnosis, indications for VR and its outcomes.

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To quantitatively determine testicular tissue stiffness values using shear wave elastography (SWE) in males that have sickle cell anemia (SCA) and to evaluate the relationship between elastography results and semen analysis parameters and hormone levels. Fifty patients diagnosed with SCA and followed up in the hematology outpatient clinic were evaluated in the urology outpatient clinic as the study group. In addition, there were 88 patients without any SCA-related complaints in the control group.

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Introduction And Hypothesis: We compared the effectiveness of intravesical combination treatment and intravesical treatment plus low-dose amitriptyline in patients with primary bladder pain syndrome (PBPS).

Methods: A total of 53 patients were included in the study. Demographic data, voiding frequency, nocturia, visual analog scale (VAS) scores, validated O'Leary-Sant IC Symptom Index (ICSI), and IC Problem Index (ICPI) scores and scores on the Short Form-36 (SF-36) questionnaire were collected from the patients at the beginning of the treatment, and at the 6th week and 6th month of the treatment.

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Background: TRUS biopsy is the preferred method for diagnosing prostate cancer, but it can cause infectious complications that arise with the contribution of fluoroquinolone resistance. We aimed to explore the potential protective effect of a second rectal enema before biopsy.

Methods: From January 2015 to December 2020, 419 patients were assessed retrospectively.

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Introduction: Following the COVID-19 pandemic, the face-to-face meetings are delayed to a future date, which is still not clear. However, seminars, meetings and conferences are necessary for updating our knowledge and skills. Web-based seminars (webinars) are the solutions to this issue.

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Background: Obesity has been associated with severe conditions and sexual dysfunction. Bariatric surgery has effects positively patients' sexual function.

Objectives: To assess the effect of bariatric surgery on sexual functions of couples.

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Different arterial segments throughout the vascular system develop similar grades of atherosclerosis concomitantly. Urethral ischemia has been proposed as a cause of urethral stricture. Therefore, we aimed to investigate the relationship between coronary artery disease severity using a SYNTAX score and urethral stricture occurrence after urethral catheterization in patients with non-ST-segment-elevation acute coronary syndrome (ACS).

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Purpose: To compare the functional outcomes of patients who underwent partial (PN) or radical nephrectomy (RN) for clinical T1 (cT1) renal tumours using the Kidney Cancer Database of the Urooncology Association, Turkey.

Methods: We retrospectively reviewed 1004 patients who underwent PN and RN for cT1 renal tumours at multiple academic tertiary centres between 2000 and 2018. Patients with preoperative end-stage chronic kidney disease and/or metastatic disease were excluded.

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Objective: We aimed to investigate the impact of surgeons' experience on pediatric percutaneous nephrolithotomy (PCNL) outcomes.

Materials And Methods: Between June 1997 and June 2018, 573 pediatric patients with 654 renal units underwent PCNL for renal stone disease by senior surgeons. Data were divided into two groups, group-1 (n = 267), first ten years period, group-2 (n = 387); second ten years period.

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Objectives: To determine the efficiency of prostate health index (PHI) calculated simultaneously during an ultrasound-guided fine-needle prostate biopsy in prostate cancer diagnosis.

Methods: The present study included 258 subsequent patients who underwent a TRUS-guided biopsy in our clinic between August 2015 and March 2016 due to elevated blood levels of PSA and suspicion of prostate cancer. The total PSA, free PSA and pro-PSA were analysed in all patients before the procedure.

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Objective: The endovenous application of n-butyl cyanoacrylate (NBCA) is a new nontumescent ablation technique for the treatment of venous insufficiency. The aim of this study was to retrospectively compare an NBCA-based ablation method with endovenous laser ablation (EVLA) for the management of incompetent great saphenous veins.

Methods: Between May 2013 and August 2014, there were 339 patients with incompetent varicose veins who were treated with either the endovenous application of NBCA (VariClose Vein Sealing System [VVSS]; Biolas, Ankara, Turkey) or EVLA.

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Introduction: The feasibility, safety and efficacy of percutaneous nephrolithotomy (PCNL) in patients with spinal deformities were evaluated and the results of a single centre experience were reported.

Patients And Methods: Between July 1999 and December 2014, 16 patients with spinal deformities underwent PCNL. The anomalies included 5 cases with kyphoscoliosis, 4 with post-polio syndrome, 3 with osteogenesis imperfecta, 3 with myotonic dystrophy, and 1 with ankylosing spondylitis.

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Objective: The aim of this study was to investigate the midterm results of Remedy biodegradable stents, which have recently come into use for lower-extremity arterial occlusive disease.

Methods: Sixty-five patients, who underwent surgical intervention in various cardiovascular surgery clinics throughout Turkey, were included in the study. The total number of stents used was 92.

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