Full Text Journal Articles by
Author Muammer Altok

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Freehand Versus Grid-Based Transperineal Prostate Biopsy: A Comparison of Anatomic Region Yield and Complications.

Ahmet Urkmez, Cihan Demirel, Muammer Altok, Tharakeswara K Bathala, Daniel D Shapiro, John W Davis,

<h4>Purpose</h4>The freehand (FH) technique of transperineal (TP) prostate biopsy using commercialized needle access systems facilitates a reduction in anesthesia requirements from general to local or local/sedation. We sought to compare the efficacy and complication rates of the FH method with those of the standard grid-based (GB) method.<h4>Materials and methods</h4>The GB ... Read more >>

J Urol (The Journal of urology)
[2021, :101097JU0000000000001902]

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Therapeutic Consequences of Omitting a Pelvic Lymph Node Dissection at Radical Prostatectomy when Grade and/or Stage Increase.

Muammer Altok, Brian F Chapin, Surena F Matin, Mary F Achim, Justin R Gregg, John W Davis,

<h4>Objective</h4>To analyze the effect on biochemical recurrence (BCR) of omitting PLND in subsequently upgraded/upstaged patients (pNx regret). Using nomograms, patients with low to intermediate-risk prostate cancer can be selected to omit a pelvic lymph node dissection (PLND) at the time of a radical prostatectomy (RP). However, some patients will experience ... Read more >>

Urology (Urology)
[2021, :]

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Temporal learning curve of a multidisciplinary team for magnetic resonance imaging/transrectal ultrasonography fusion prostate biopsy.

Ahmet Urkmez, John F Ward, Haesun Choi, Patricia Troncoso, Irene Inguillo, Justin R Gregg, Muammer Altok, Huseyin C Demirel, Wei Qiao, Hyunseon C Kang,

BJU Int (BJU international)
[2021, 127(5):524-527]

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Prostate cancer upgrading or downgrading of biopsy Gleason scores at radical prostatectomy: prediction of "regression to the mean" using routine clinical features with correlating biochemical relapse rates.

Muammer Altok, Patricia Troncoso, Mary F Achim, Surena F Matin, Graciela N Gonzalez, John W Davis,

Recommendations for managing clinically localized prostate cancer are structured around clinical risk criteria, with prostate biopsy (PB) Gleason score (GS) being the most important factor. Biopsy to radical prostatectomy (RP) specimen upgrading/downgrading is well described, and is often the rationale for costly imaging or genomic studies. We present simple, no-cost ... Read more >>

Asian J Androl (Asian journal of andrology)
[2019, 21(6):598-604]

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Focal therapy for localized prostate cancer: is there a "middle ground" between active surveillance and definitive treatment?

Cihan H Demirel, Muammer Altok, John W Davis,

In recent years, it has come a long way in the diagnosis, treatment, and follow-up of prostate cancer. Beside this, it was argued that definitive treatments could cause overtreatment, particularly in the very low, low, and favorable risk group. When alternative treatment and follow-up methods are being considered for this ... Read more >>

Asian J Androl (Asian journal of andrology)
[2018, :]

Cited: 2 times

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Cost and efficacy comparison of five prostate biopsy modalities: a platform for integrating cost into novel-platform comparative research.

Muammer Altok, Bumyang Kim, Bina B Patel, Ya-Chen Tina Shih, John F Ward, Stephen E McRae, Brian F Chapin, Louis L Pisters, Curtis A Pettaway, Jeri Kim, Huseyin C Demirel, John W Davis,

<h4>Background</h4>The cornerstone of prostate cancer diagnosis remains the transrectal ultrasound-guided biopsy (TRUS-BX), which most frequently occurs in the office setting under local anesthesia. However, there are now other techniques of prostate biopsy aimed at improving outcomes such as patient comfort, significant cancer detection, and infectious complications. The purpose of the ... Read more >>

Prostate Cancer Prostatic Dis (Prostate cancer and prostatic diseases)
[2018, 21(4):524-532]

Cited: 6 times

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Surgeon-led prostate cancer lymph node staging: pathological outcomes stratified by robot-assisted dissection templates and patient selection.

Muammer Altok, Kara Babaian, Mary F Achim, Grace C Achim, Patricia Troncoso, Surena F Matin, Brian F Chapin, John W Davis,

OBJECTIVES:To evaluate the perioperative, pathological, and oncological outcomes from surgeon-led pathological staging of pelvic lymph node (LN) metastases at the time of robot-assisted radical prostatectomy (RARP). PATIENTS AND METHODS:Over the 6-year period of 2006-2012, three distinct pelvic LN dissection (PLND) strategies were used in chronological order at a single cancer ... Read more >>

BJU Int (BJU international)
[2018, 122(1):66-75]

Cited: 2 times

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Ureteral orifice involvement by urothelial carcinoma: long term oncologic and functional outcomes.

Muammer Altok, Ali F Sahin, Mehmet I Gokce, Gokhan R Ekin, Rauf Taner Divrik,

<h4>Purpose</h4>Bladder cancer (BC) may involve the ureteral orifice, and the resection of the orifice has oncological and functional consequences such as development of upper tract urothelial carcinoma (UTUC), vesicoureteral reflux or ureteral stenosis. The aim of this study was to investigate the oncological and functional outcomes of the ureteral orifice ... Read more >>

Int Braz J Urol (International braz j urol : official journal of the Brazilian Society of Urology)
[2017, 43(6):1052-1059]

Cited: 2 times

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A decade of robot-assisted radical prostatectomy training: Time-based metrics and qualitative grading for fellows and residents.

Muammer Altok, Mary F Achim, Surena F Matin, Curtis A Pettaway, Brian F Chapin, John W Davis,

<h4>Objectives</h4>As modern urology residency and fellowship training in robot-assisted surgery evolves toward standardized curricula (didactics, dry/wet-laboratory exercises, and surgical assistance), additional tools are needed to evaluate on-console performance. At the start of our robotics program in 2006, we set-up a time- and quality-based evaluation program and aim to consolidate this ... Read more >>

Urol Oncol (Urologic oncology)
[2018, 36(1):13.e19-13.e25]

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Author Reply.

Mustafa Güneş, Mehmet Umul, Özlem Özmen, Muammer Altok,

Urology (Urology)
[2017, 102:246]

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A Novel Experimental Method for Penile Augmentation Urethroplasty With a Combination of Buccal Mucosa and Amniotic Membrane in a Rabbit Model.

Mustafa Güneş, Muammer Altok, Özlem Özmen, Mehmet Umul, Alime Güneş, Ercan Baş, Zafer Özyildiz, Tolga Taha Sönmez, Hikmet Orhan,

<h4>Objective</h4>To investigate the results of penile urethral reconstruction using amniotic membrane (AM) and buccal mucosa (BM) grafts, and the simultaneous use of both in a rabbit model.<h4>Materials and methods</h4>A total of 28 male rabbits were divided into 4 groups according to grafting style: group 1 (AM), group 2 (BM), group ... Read more >>

Urology (Urology)
[2017, 102:240-246]

Cited: 2 times

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Second primary cancers in patients with urothelial cancers.

Ali Feyzullah Şahin, Muammer Altok, Fırat Akdeniz, Güner Yıldız, Rauf Taner Divrik,

<h4>Purpose</h4>To investigate the second primary cancers (SPCs) in patients with urothelial cancer (UC).<h4>Materials and methods</h4>The records of 2,339 patients whose UC was diagnosed between January 1974 and December 2012 were reviewed. All data about characteristics of patients, of UC and, of SPC was, recorded digitally. We investigated the prevalence and ... Read more >>

Investig Clin Urol (Investigative and clinical urology)
[2016, 57(5):330-335]

Cited: 1 time

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The effectiveness of extra-scrotal fixation following manual detorsion for testicular torsion: a pilot study in a rabbit model.

Mustafa Güneş, Muammer Altok, Özlem Özmen, Bumin Değirmenci, Zafer Özyildiz, Ercan Baş, Mustafa Kara, Cevdet Kaya,

<h4>Introduction</h4>To investigate the effectiveness of manual detorsion (MD) and applicability of extra-scrotal fixation for testicular torsion in a rabbit model.<h4>Material and methods</h4>Twelve New Zealand male rabbits were randomized into six groups of two rabbits each. A single-side testicular torsion (TT) model (different degrees, time and sides) was performed in all ... Read more >>

Cent European J Urol (Central European journal of urology)
[2016, 69(4):411-416]

Cited: 1 time

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Atypical Testicular Torsion: We Must be Cautious in the Course of Manual Detorsion.

Mustafa Güneş, Mehmet Umul, Muammer Altok,

Testicular torsion is a common important urological emergency. Testicles usually undergo various degrees of rotation in a medial (inward) direction. Manual detorsion is a critical maneuver, allowing to prevent testis viability in patients with delay to get into the operation room. Testis torsion rarely occurs in lateral direction. It is ... Read more >>

Pediatr Emerg Care (Pediatric emergency care)
[2016, 32(10):691-692]

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Comparison of shockwave frequencies of 30 and 60 shocks per minute for kidney stones: a prospective randomized study.

Muammer Altok, Mustafa Güneş, Mehmet Umul, Ali Feyzullah Şahin, Ercan Baş, Taylan Oksay, Sedat Soyupek,

<h4>Objective</h4>One of the factors that determines the treatment success of shockwave lithotripsy (SWL) is the frequency of the shockwaves during the procedure. This study compared the efficacy and pain perception of shockwave frequencies at 30 versus 60 shocks/min for kidney stones.<h4>Materials and methods</h4>From August 2013 to May 2015, 160 patients ... Read more >>

Scand J Urol (Scandinavian journal of urology)
[2016, 50(6):477-482]

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Chromosomal aberrations in benign prostatic hyperplasia patients.

Muammer Altok, Özkan Bağcı, Mehmet Umul, Mustafa Güneş, Mehmet Akyüz, Fatih Uruç, Efkan Uz, Sedat Soyupek,

<h4>Purpose</h4>To investigate the chromosomal changes in patients with benign prostatic hyperplasia (BPH).<h4>Materials and methods</h4>A total of 54 patients diagnosed with clinical BPH underwent transurethral prostate resection to address their primary urological problem. All patients were evaluated by use of a comprehensive medical history and rectal digital examination. The preoperative evaluation ... Read more >>

Investig Clin Urol (Investigative and clinical urology)
[2016, 57(1):45-49]

Cited: 3 times

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The effect of thermochemotherapy with mitomycin C on normal bladder urothelium, an experimental study.

Murat Uçar, Muammer Altok, Mehmet Umul, Dilek Bayram, İlkay Armağan, Mustafa Güneş, Tahsin Çapkin, Sedat Soyupek,

To investigate the effects of thermochemotherapy with mitomycin C (MMC) on normal rabbit bladder urothelium and to compare it with standard intravesical MMC and hyperthermia with normal saline.Twenty-four male New Zealand rabbits, with a mean weight of 2.7 kg (in weight of 2.1–4.3 kg), were divided into three groups, each ... Read more >>

Int Urol Nephrol (International urology and nephrology)
[2016, 48(1):79-84]

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Do anxiety, stress, or depression have any impact on pain perception during shock wave lithotripsy?

Muammer Altok, Abdullah Akpinar, Mustafa Güneş, Mehmet Umul, Kadir Demirci, Ercan Baş,

<h4>Introduction</h4>The most important adverse effect during shock wave lithotripsy (SWL) is pain perception. In this study, we evaluated the effect of anxiety, stress, and depression on pain perception during SWL.<h4>Methods</h4>From November 2013 to December 2014, 189 consecutive patients undergoing SWL for kidney stones were evaluated prospectively. Patient characteristics (age, sex, ... Read more >>

Can Urol Assoc J (Canadian Urological Association journal = Journal de l'Association des urologues du Canada)
[2016, 10(5-6):E171-E174]

Cited: 1 time

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A Novel Approach to Penile Augmentation Urethroplasty Using Buccal Mucosa and Amniotic Membrane: A Pilot Study in a Rabbit Model.

Mustafa Güneş, Muammer Altok, Alime Güneş, Mehmet Umul, Zafer Özyıldız, Tolga Taha Sönmez, Hikmet Orhan, Özlem Özmen,

<h4>Objective</h4>To evaluate and compare the success of amniotic membrane (AM) and buccal mucosa (BM) grafts and simultaneous use of both in penile augmentation urethroplasty in rabbits.<h4>Materials and methods</h4>A total of 12 New Zealand rabbits were divided into 3 groups by grafting style: Group 1 (AM), Group 2 (BM), and Group ... Read more >>

Urology (Urology)
[2016, 87:210-215]

Cited: 7 times

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The relationship between platelet-lymphocyte ratio and severity of erectile dysfunction.

Alpaslan Akbas, Murat Tolga Gulpınar, Eyüp Burak Sancak, Mustafa Gunes, Murat Ucar, Muammer Altok, Mehmet Umul,

The prognostic importance of platelet-lymphocyte ratio (PLR) is already known for various artery diseases. In this study, the relationship between PLR and severity of erectile dysfunction (ED) is examined in patients with impotence. The data from patients suffering from erection problems was screened retrospectively. Detailed medical history, age, International Index ... Read more >>

Kaohsiung J Med Sci (The Kaohsiung journal of medical sciences)
[2016, 32(2):91-95]

Cited: 2 times

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The authors reply: Predictive role of hematologic parameters in testicular torsion.

Mustafa Güneş, Mehmet Umul, Muammer Altok,

Korean J Urol (Korean journal of urology)
[2015, 56(8):603]

Cited: 0 times

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Prospective comparison of ligation and bipolar cautery technique in non-scalpel vasectomy.

Muammer Altok, Ali Feyzullah Şahin, Rauf Taner Divrik, Umit Yildirim, Ferruh Zorlu,

<h4>Objectives</h4>There is no trial comparing bipolar cautery and ligation for occlusion of vas in non-scalpel vasectomy. This study aimed to compare the effectiveness of these vasectomy occlusion techniques.<h4>Materials and methods</h4>Between January 2002-June 2009, patients were allocated in alternate order. We recruited 100 cases in cautery group and 100 cases in ... Read more >>

Int Braz J Urol (International braz j urol : official journal of the Brazilian Society of Urology)
[2015, 41(6):1172-1177]

Cited: 2 times

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Does resectoscope size play a role in formation of urethral stricture following transurethral prostate resection?

Mustafa Günes, Muzaffer Oguz Keles, Cevdet Kaya, Orhan Koca, Zülfü Sertkaya, Mehmet Akyüz, Muammer Altok, Mehmet Umul, Muhammet Ihsan Karaman,

<h4>Background and aims</h4>To investigate the possible effect of resectoscope size on urethral stricture rate after monopolar TURP.<h4>Materials and methods</h4>A retrospective study of 71 men undergoing TURP was conducted at two centers' from November 2009 to May 2013. The patients were divided into one of two groups according to the resectoscope ... Read more >>

Int Braz J Urol (International braz j urol : official journal of the Brazilian Society of Urology)
[2015, 41(4):744-749]

Cited: 4 times

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The efficacy of duration of prophylactic antibiotics in transrectal ultrasound guided prostate biopsy.

Volkan Bulut, Ali Feyzullah Şahin, Yavuz Balaban, Muammer Altok, Rauf Taner Divrik, Ferruh Zorlu,

<h4>Introduction</h4>We aimed to evaluate the efficacy of the duration of prophylactic antibiotic administration in patients undergoing transrectal ultrasound (TRUS) guided biopsy.<h4>Material and methods</h4>A total of 367 patients undergoing a prostate biopsy between September 2007 and June 2009 was reviewed retrospectively and divided into 2 groups according to prophilaxy: oral ciprofloxacin ... Read more >>

Int Braz J Urol (International braz j urol : official journal of the Brazilian Society of Urology)
[2015, 41(5):906-910]

Cited: 2 times

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Is it possible to distinguish testicular torsion from other causes of acute scrotum in patients who underwent scrotal exploration? A multi-center clinical trial.

Mustafa Güneş, Mehmet Umul, Muammer Altok, Mehmet Akyüz, Cemal Selçuk İşoğlu, Fatih Uruç, Bekir Aras, Zülfü Sertkaya, Ahmet Ürkmez, Ercan Baş, Muzaffer Oğuz Keleş,

<h4>Introduction</h4>To assess the clinical presentation of patients who underwent surgical exploration for acute scrotum and to investigate the potentially related factors for differential dignosis.<h4>Material and methods</h4>We retrospectively analyzed the medical records of 97 patients who underwent surgical exploration for acute scrotum between May 2007 and July 2013. The patients were ... Read more >>

Cent European J Urol (Central European journal of urology)
[2015, 68(2):252-256]

Cited: 1 time

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