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Dive into the research topics where John T. Sigalos is active.

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Featured researches published by John T. Sigalos.


Translational Andrology and Urology | 2017

Chronic orchialgia: epidemiology, diagnosis and evaluation

John T. Sigalos; Alexander W. Pastuszak

Chronic orchialgia is a vexing condition defined as chronic or intermittent scrotal pain lasting at least three months that significantly interferes with daily activities. There are currently no guidelines regarding the diagnosis and management of this condition despite it being the cause of 2.5–4.8% of urologic clinic visits. Men often present with chronic orchialgia in their mid to late 30s, although the condition can present at any age. A broad differential diagnosis of chronic orchialgia includes epididymitis, testicular torsion, tumors, obstruction, varicocele, epididymal cysts, hydrocele, iatrogenic injury following vasectomy or hernia repair, and referred pain from a variety of sources including mid-ureteral stone, indirect inguinal hernia, aortic or common iliac artery aneurysms, lower back disorders, interstitial cystitis, and nerve entrapment due to perineural fibrosis; approximately 25–50% of chronic orchialgia is idiopathic in nature. In such cases, it is reasonable to consider psychological and psychosocial factors that may be contributing to chronic pain. Invasive testing is not recommended in the work-up of chronic orchialgia.


Sexual medicine reviews | 2018

The Safety and Efficacy of Growth Hormone Secretagogues

John T. Sigalos; Alexander W. Pastuszak

INTRODUCTION Growth hormone (GH) increases lean body mass, decreases fat mass, increases exercise tolerance and maximum oxygen uptake, enhances muscle strength, and improves linear growth. Long-term studies of GH administration offer conflicting results on its safety, which has led to strict Food and Drug Administration criteria for GH use. The potential drawbacks of exogenous GH use are believed to be due in part to impaired regulatory feedback. AIM To review the literature on GH secretagogues (GHSs), which include GH-releasing peptides and the orally available small-molecule drug ibutamoren mesylate. METHODS Review of clinical studies on the safety and efficacy of GHSs in human subjects. MAIN OUTCOME MEASURE Report on the physiologic changes from GHS use in human subjects including its safety profile. RESULTS GHSs promote pulsatile release of GH that is subject to negative feedback and can prevent supra-therapeutic levels of GH and their sequelae. To date, few long-term, rigorously controlled studies have examined the efficacy and safety of GHSs, although GHSs might improve growth velocity in children, stimulate appetite, improve lean mass in wasting states and in obese individuals, decrease bone turnover, increase fat-free mass, and improve sleep. Available studies indicate that GHSs are well tolerated, with some concern for increases in blood glucose because of decreases in insulin sensitivity. CONCLUSION Further work is needed to better understand the long-term impact of GHSs on human anatomy and physiology and more specifically in the context of a diversity of clinical scenarios. Furthermore, the safety of these compounds with long-term use, including evaluation of cancer incidence and mortality, is needed. Sigalos JT, Pastuszak AW. The Safety and Efficacy of Growth Hormone Secretagogues. Sex Med Rev 2018;6:45-53.


Medical Clinics of North America | 2018

Hypogonadism: Therapeutic Risks, Benefits, and Outcomes

John T. Sigalos; Alexander W. Pastuszak; Mohit Khera

Hypogonadism is a common condition defined by the presence of low serum testosterone levels and hypogonadal symptoms, and most commonly treated using testosterone therapy (TTh). The accuracy of diagnosis and appropriateness of treatment, along with proper follow-up, are increasingly important given the large increase in testosterone prescriptions and the recent concern for cardiovascular (CV) risk associated with TTh. In March of 2015, the US Food and Drug Administration required that testosterone product labels disclose a potential CV risk, despite the evidence base for this association being weak and inconclusive. However, TTh may improve CV outcomes rather than increase risks.


Urology | 2017

The Role of the Urologist in the Era of in Vitro Fertilization / Intracytoplasmic Sperm Injection.

Alexander W. Pastuszak; John T. Sigalos; Larry I. Lipshultz

The use of in vitro fertilization and intracytoplasmic sperm injection has dramatically increased. In spite of this, the male partner in the couple is often not evaluated for fertility status or other general health conditions associated with male infertility. Such an approach goes against established guidelines recommending dual partner evaluations and does not address longer term male health risks. In this review, we discuss the urologists role in the era of in vitro fertilization-intracytoplasmic sperm injection, which includes diagnosing serious conditions associated with infertility, treating reversible causes of infertility, defining untreatable causes of testis failure, and, when appropriate, facilitating sperm retrieval.


The Journal of Urology | 2017

MP13-12 SHIFT WORKERS WITH SHIFT WORK SLEEP DISORDER HAVE INCREASED LOWER URINARY TRACT SYMPTOMS

John T. Sigalos; Javier Santiago; Edgar W. Kirby; Mark Hockenberry; Taylor P. Kohn; Stephen M. Pickett; Alexander W. Pastuszak; Larry I. Lipshultz

but a significant difference was observed in terms of energy ratio 1⁄4 Energy delivered / prostate volume (Graphic 2) : 3.2kJ / ml [ 2.5 , 4.1kJ] ( Montreal ) vs 2.5kJ / ml [ 1.7-3.0] ( Paris ) vs 4.1kJ / ml [ 2.9-5.2] (Toulouse) (p < 0.0001). (Figure 2) No differences were observed in terms of postoperative complications (17.6% vs. 22.3% vs. 19.8%; p1⁄40.64) CONCLUSIONS: This is the first study to support that the outcomes obtained during PVP learning curve may be influenced by patients and surgeons’ characteristics. In this study, 100 Greenlight 180-W XPS PVP procedures were required before to reach a plateau in intraoperative parameters.


The Journal of Urology | 2017

MP89-16 CHARACTERISTICS AND MOTIVATIONS OF MEN WHO SEEK VASECTOMY REVERSAL

John T. Sigalos; Mark Hockenberry; Edgar W. Kirby; Jordan Krieger; Alexander W. Pastuszak; Larry I. Lipshultz

childless vs those with children, bilateral VV performed in 74% vs 66%, bilateral VE performed in 10% vs 12% and combination VV/VE in 13% vs 16%; these differences were not significant. Patency was 98% (n1⁄4102) for childless men and 94% (n1⁄4949) for men with prior children. CONCLUSIONS: This retrospective review sheds light on a unique population of men for which there is a paucity of data in the literature. To our knowledge this is the first study examining childless men electing vasectomy reversal. This data offers important information that may be included in preoperative counseling targeted specifically to men whom have not fathered children.


The Journal of Urology | 2017

PD38-07 ROBOT-ASSISTED INTRACORPOREAL RIGHT COLON CONTINENT CUTANEOUS URINARY DIVERSION AND AUGMENTATION CYSTOPLASTY: A SINGLE INSTITUTION EXPERIENCE

Spencer Craven; John T. Sigalos; Rose Khavari; Alvin Goh

INTRODUCTION AND OBJECTIVES: Continent cutaneous diversion (CCD) is a less commonly utilized diversion choice following open or robotic cystectomy. We have previously described a novel technique for robotic intracorporeal CCD. Meanwhile, continent cutaneous augmentation cystoplasty (CCAC) is a viable option for patients with neurogenic bladder. There is limited worldwide experience performing intracorporeal CCD and no studies describing intracorporeal CCAC. Principles developed in robotic CCD can be readily applied to robotic CCAC. We share our experience with these novel robotic procedures. METHODS: Robotic cystectomy was performed in patients undergoing CCD using a standard 6-port technique. The patient and robot were then repositioned for intracorporeal bowel mobilization and segmentation, ileocolonic anastomosis, uretero-colonic anastomoses, pouch construction, tapering of catheterization channel, reinforcement of ileocecal valve, and stoma creation. All patients were placed on an evidencebased Enhanced Recovery after Surgery protocol postoperatively. Operative times, intraoperative blood loss (EBL), length of stay (LOS), and complications occurring within 90 days of surgery were reviewed. RESULTS: Ten robotic intracorporeal right colon urinary diversions, including four robotic intracorporeal CCAC and six robotic intracorporeal CCD, were performed. Mean total operative times for cystectomy and intracorporeal urinary diversion were 7.8 and 10 hours for CCAC or CCD respectively (5.4-9.5; 7.9-12.9). Mean EBL was 181ml (75-300) for CCAC and 250ml (100-500) for CCD. Mean LOS for CCAC and CCD groups was 10 and 8.8 days respectively (5-18, 4-18). A single CCAC patient required transfusion postoperatively. Two high grade complications (Clavien III or greater) were reported in the CCAC group (50%). One high grade complication was reported in the CCD group (17%). Within 30 days of surgery, no CCAC and two CCD patients required readmission (0%, 33%). With a median follow up of 17 months, no incontinence was reported and all patients were able to catheterize without difficulty. CONCLUSIONS: We demonstrate that robotic intracorporeal CCD and CCAC are technically feasible and safe with good functional outcomes. Further evaluation of these novel surgical techniques along with comparative studies are needed.


American Journal of Men's Health | 2017

Growth Hormone Secretagogue Treatment in Hypogonadal Men Raises Serum Insulin-Like Growth Factor-1 Levels:

John T. Sigalos; Alexander W. Pastuszak; Andrew Allison; Samuel Ohlander; Amin S. Herati; Mark C. Lindgren; Larry I. Lipshultz

Realizing the reported misuse of human growth hormone (GH), investigation of a safe alternative mechanism for increasing endogenous GH is needed. Several GH secretagogues are available, including GH-releasing peptides (GHRPs) GHRP-2 and GHRP-6, and the GH-releasing hormone analog, sermorelin (SERM). Insulin-like growth factor 1 (IGF-1) serves as a surrogate marker for GH. Here, the effect of GHRP/SERM therapy on IGF-1 levels is evaluated. A retrospective review of medical records was performed for 105 men on testosterone (T) therapy seeking increases in lean body mass and fat loss who were prescribed 100 mcg of GHRP-6, GHRP-2, and SERM three times daily. Compliance with therapy was assessed, and 14 men met strict inclusion criteria. Serum hormone levels of IGF-1, T, free T (FT), estradiol (E), luteinizing hormone (LH), and follicle-stimulating hormone (FSH) were evaluated. Mean (SD) age of the cohort was 33.2 (2.9) years, and baseline IGF-1 level was 159.5 (26.7) ng/mL. Mean (SD) duration of continuous GHRP/SERM treatment was 134 (88) days. Mean posttreatment IGF-1 level was 239.0 (54.6) ng/mL (p < .0001). Three of the 14 men were on an aromatase inhibitor and/or tamoxifen prior to treatment and another 4 men were coadministered an aromatase inhibitor and/or tamoxifen during treatment. Inhibition of E production or estrogen receptor blockade resulted in smaller increases in IGF-1 levels. GHRP/SERM therapy increases serum IGF-1 levels with strict compliance to thrice-daily dosing. The results suggest that combination therapy may be beneficial in men with wasting conditions that can improve with increased GH secretion.


The Journal of Urology | 2018

PD27-08 POOR SLEEP QUALITY IS ASSOCIATED WITH CLINICALLY SIGNIFICANT ERECTILE DYSFUNCTION

Taylor P. Kohn; Katherine M. Rodriguez; John T. Sigalos; Asad Hasan; Alexander W. Pastuszak; Larry I. Lipshultz


The Journal of Urology | 2018

PD31-07 TESTOSTERONE USE DOES NOT RESULT IN WORSE CARDIOVASCULAR RISK: A LONGITUDINAL EVALUATION OF CARDIOVASCULAR RISK BIOMARKERS

John T. Sigalos; Zachary Dao; Luis Cartagenova; Taylor P. Kohn; Alexander W. Pastuszak; Larry I. Lipshultz

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Taylor P. Kohn

Baylor College of Medicine

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Amin S. Herati

Baylor College of Medicine

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Edgar W. Kirby

Baylor College of Medicine

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Andrew Allison

Baylor College of Medicine

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Mark Hockenberry

University of Pennsylvania

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Samuel Ohlander

University of Illinois at Chicago

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Alvin Goh

Baylor College of Medicine

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