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Dive into the research topics where Robert B. Nadler is active.

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Featured researches published by Robert B. Nadler.


The Journal of Urology | 1995

Effect of Inflammation and Benign Prostatic Hyperplasia on Elevated Serum Prostate Specific Antigen Levels

Robert B. Nadler; Peter A. Humphrey; Deborah S. Smith; William J. Catalona; Timothy L. Ratliff

PURPOSE We quantify the causes of elevated serum prostate specific antigen (PSA) concentrations in men whose prostate biopsies repeatedly showed no cancer. MATERIALS AND METHODS The effects of prostate volume, inflammation, echogenicity on ultrasound and calculi were examined in a large PSA-based screening population of 148 men with serum PSA concentrations greater than 4.0 ng./ml., findings suspicious for cancer on digital rectal examination and multiple negative biopsies. These men were selected and compared to 64 men with suspicious rectal examinations, multiple negative biopsies and serum PSA concentrations of 4.0 ng./ml. or less. RESULTS The high PSA group had larger prostates (68 versus 33 cc, p = 0.0001) and significantly more subclinical prostatic inflammation. Acute and chronic inflammation was more prevalent in the high PSA group (63% versus 27%, p = 0.0001 and 99% versus 77%, p = 0.0001, respectively). A simultaneous regression analysis showed that prostatic size accounted for 23%, inflammation 7%, prostatic calculi 3% and nonisoechoic ultrasound lesions 1% of the serum PSA variance. CONCLUSIONS Prostate volume and inflammation are the most important factors contributing to serum PSA elevation in men without clinically detectable prostate cancer.


The Journal of Urology | 2012

Targeted antimicrobial prophylaxis using rectal swab cultures in men undergoing transrectal ultrasound guided prostate biopsy is associated with reduced incidence of postoperative infectious complications and cost of care.

Aisha Taylor; Teresa R. Zembower; Robert B. Nadler; Marc H. Scheetz; John Cashy; Diana K. Bowen; Adam B. Murphy; Elodi Dielubanza; Anthony J. Schaeffer

PURPOSE We evaluated targeted antimicrobial prophylaxis in men undergoing transrectal ultrasound guided prostate biopsy based on rectal swab culture results. MATERIALS AND METHODS From July 2010 to March 2011 we studied differences in infectious complications in men who received targeted vs standard empirical ciprofloxacin prophylaxis before transrectal ultrasound guided prostate biopsy. Targeted prophylaxis used rectal swab cultures plated on selective media containing ciprofloxacin to identify fluoroquinolone resistant bacteria. Patients with fluoroquinolone susceptible organisms received ciprofloxacin while those with fluoroquinolone resistant organisms received directed antimicrobial prophylaxis. We identified men with infectious complications within 30 days after transrectal ultrasound guided prostate biopsy using the electronic medical record. RESULTS A total of 457 men underwent transrectal ultrasound guided prostate biopsy, and of these men 112 (24.5%) had rectal swab obtained while 345 (75.5%) did not. Among those who received targeted prophylaxis 22 (19.6%) men had fluoroquinolone resistant organisms. There were no infectious complications in the 112 men who received targeted antimicrobial prophylaxis, while there were 9 cases (including 1 of sepsis) among the 345 on empirical therapy (p=0.12). Fluoroquinolone resistant organisms caused 7 of these infections. The total cost of managing infectious complications in patients in the empirical group was


Annals of Internal Medicine | 2004

Ciprofloxacin or Tamsulosin in Men with Chronic Prostatitis/Chronic Pelvic Pain Syndrome: A Randomized, Double-Blind Trial

Richard B. Alexander; Kathleen J. Propert; Anthony J. Schaeffer; J. Richard Landis; J. Curtis Nickel; Michael P. O'Leary; Michel A. Pontari; Mary McNaughton-Collins; Daniel A. Shoskes; Craig V. Comiter; Nand S. Datta; Jackson E. Fowler; Robert B. Nadler; Scott I. Zeitlin; Jill S. Knauss; Yanlin Wang; John W. Kusek; Leroy M. Nyberg; Mark S. Litwin

13,219. The calculated cost of targeted vs empirical prophylaxis per 100 men undergoing transrectal ultrasound guided prostate biopsy was


The Journal of Urology | 2000

IL-1β and TNF-α in prostatic secretions are indicators in the evaluation of men with chronic prostatitis

Robert B. Nadler; Alisa E. Koch; Elizabeth A. Calhoun; Phillip L. Campbell; Denise L. Pruden; Charles L. Bennett; Paul R. Yarnold; Anthony J. Schaeffer

1,346 vs


The New England Journal of Medicine | 2008

Alfuzosin and Symptoms of Chronic Prostatitis–Chronic Pelvic Pain Syndrome

J. Curtis Nickel; John N. Krieger; Mary McNaughton-Collins; Rodney U. Anderson; Michel A. Pontari; Daniel A. Shoskes; Mark S. Litwin; Richard B. Alexander; Paige White; Richard A. Berger; Robert B. Nadler; Michael P. O'Leary; Men Long Liong; Scott I. Zeitlin; Shannon Chuai; J. Richard Landis; John W. Kusek; Leroy M. Nyberg; Anthony J. Schaeffer

5,598, respectively. Cost-effectiveness analysis revealed that targeted prophylaxis yielded a cost savings of


Urology | 2000

Biofeedback, pelvic floor re-education, and bladder training for male chronic pelvic pain syndrome

J. Quentin Clemens; Robert B. Nadler; Anthony J. Schaeffer; Jay Belani; Jeff Albaugh; Wade Bushman

4,499 per post-transrectal ultrasound guided prostate biopsy infectious complication averted. Per estimation, 38 men would need to undergo rectal swab before transrectal ultrasound guided prostate biopsy to prevent 1 infectious complication. CONCLUSIONS Targeted antimicrobial prophylaxis was associated with a notable decrease in the incidence of infectious complications after transrectal ultrasound guided prostate biopsy caused by fluoroquinolone resistant organisms as well as a decrease in the overall cost of care.


Urology | 2000

Evaluation of the cytokines interleukin 8 and epithelial neutrophil activating peptide 78 as indicators of inflammation in prostatic secretions.

Werner W. Hochreiter; Robert B. Nadler; Alisa E. Koch; Phillip L. Campbell; Martin Ludwig; W. Weidner; Anthony J. Schaeffer

Context Although the cause of chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) is unknown, physicians sometimes try to treat it with antibiotics or -receptor blockers. Contribution In this multicenter, double-blind factorial trial, 196 men with moderately severe CP/CPPS were randomly assigned to 6 weeks of treatment with ciprofloxacin, tamsulosin, both drugs, or placebo. Neither ciprofloxacin nor tamsulosin substantively reduced symptoms. Implications Ciprofloxacin and tamsulosin were not effective treatments for CP/CPPS. Cautions Patients had long-standing, refractory CP/CPPS and received trial treatments for only 6 weeks. Patients with new diagnoses who are given longer courses of the trial treatments might respond differently. The Editors Chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) is a common disorder and accounts for approximately 2 million visits to physicians annually in the United States (1). The substantial impact of CP/CPPS includes bothersome lower urinary tract symptoms, sexual dysfunction, reduced quality of life (2-5), and increased health care expenditures (6). The syndrome is diagnosed only on the basis of symptoms, principally pain or discomfort in the pelvic region. No objective measures can help define the disease. Although bacteria can infect the prostate, most men with prostatitis have a negative midstream urine culture, indicating that bacteria may not be the cause of their symptoms (2). Such men are classified as having National Institutes of Health (NIH) category III prostatitis, the most common of the clinically defined prostatitis syndromes (7). It is by no means clear that the disease is characterized by inflammation of the prostate or that the prostate is responsible for symptoms in a substantial proportion of patients. Because of this uncertainty, the term CP/CPPS is used. Chronic prostatitis/chronic pelvic pain syndrome is commonly seen by primary care practitioners, internists, and urologists. In the Olmsted County Study of Urinary Symptoms and Health Status Among Men (8), a population-based study in Olmstead County, Minnesota, the overall prevalence rate of a physician-assigned diagnosis of prostatitis was 9%. Population-based surveys of symptoms have estimated that the prevalence of the syndrome ranges from 9% to 12% among men (9, 10). It is difficult to estimate the proportion of patients with symptoms lasting longer than 3 months whose disorder remains refractory to empirical therapy. These patients are commonly seen by urologists, but whether they represent a minor subpopulation of the overall symptomatic group or make up the majority of patients is unknown. We chose to study these patients because they present with a troubling, long-standing problem and are usually treated with agents of unclear benefit. Even if a relatively large number of men whose symptoms last 3 months or more are cured by standard empirical therapy and the clinical scenario we describe is uncommon, men with refractory symptoms still present a substantial problem to internists and urologists who have little information to guide therapy. Because the cause of CP/CPPS is unknown, affected men receive many empirical therapies. The 2 most common treatments prescribed by physicians are antimicrobial agents and -adrenergic receptor antagonists (2), although there is little objective evidence to support their use (11). Quinolones, such as ciprofloxacin, are commonly used to treat CP/CPPS because of their excellent penetration into the prostate and broad spectrum of coverage for uropathogens and other organisms traditionally believed to be associated with the syndrome (12). Tamsulosin, an -blocker, is an effective treatment for lower urinary tract symptoms in men with benign prostatic hyperplasia, and it has been hypothesized that tamsulosin may improve these symptoms in men with CP/CPPS. This randomized clinical trial was designed to evaluate whether ciprofloxacin or tamsulosin reduces symptoms of long-standing CP/CPPS of at least moderate severity, typical of the 488 men in our Chronic Prostatitis Cohort Study (2). The primary purpose of the trial was to test the most common prescription treatments given to men with CP/CPPS, who are commonly seen in our referral-based urologic practices. Methods Organization The Chronic Prostatitis Collaborative Research Network, a consortium sponsored by the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), conducted the trial. Urologists and their clinical associates recruited patients at 10 sites in the United States and 1 site in Canada. The NIDDK established an independent data and safety monitoring board to review the progress, safety, and final analysis of the trial. The individual institutional review boards at each of the 10 participating clinical centers approved the study, and all men gave written informed consent. Participants The design of this trial has been described in detail previously (13). Participating urologists recruited both newly referred patients and patients with established CP/CPPS from their referral-based clinical practices at 10 tertiary medical centers in North America. Trial referrals came from primary care providers, internists, and other urologists. The primary diagnostic criterion was pain or discomfort in the pelvic region for at least 3 months in the previous 6 months. Severity of symptoms was assessed by using the National Institutes of Health Chronic Prostatitis Symptom Index (NIH-CPSI) (14, 15). This instrument is a validated questionnaire, completed by the patient, consisting of 4 questions about pain, 3 about voiding symptoms, and 2 about quality of life. The scores in these 3 individual domains (pain, voiding, and quality of life) are combined without weighting to yield the NIH-CPSI total score. Eligible men were required to have at least moderate symptoms, defined as an NIH-CPSI score of at least 15 of 43 possible points, at the time of randomization. We excluded men who had a documented urinary tract infection (midstream urine culture > 100000 colonies/mL) within the past 3 months, a history of active genital herpes within the previous year, a history of genitourinary cancer, inflammatory bowel disease, active urethral stricture, prostate or bladder surgery, or neurologic disease affecting the bladder. We used ligase chain reaction to screen for Chlamydia in urethral urine samples and excluded men whose tests yielded positive results. Previous treatment with antimicrobial agents or -adrenergic receptor blockers, including the study drugs, had to be completed at least 4 weeks before eligibility screening. Additional details of the eligibility criteria are available elsewhere (13). Study Design and Interventions Men were randomly assigned in equal proportions within a 2 2 factorial design to receive placebo; ciprofloxacin alone, 500 mg twice daily; tamsulosin alone, 0.4 mg once daily; or a combination of both drugs (Table 1). Patients were treated for 6 weeks, at which time the primary end point was assessed. Symptoms at 9 and 12 weeks after randomization (6 weeks after completion of treatment) were also assessed to evaluate longer-term treatment response. The 2 baseline screening contacts and the primary end point contact at 6 weeks were clinic visits; interim contacts at 3, 9, and 12 weeks were conducted by telephone. Table 1. Study Design Each patient was randomly assigned by computer. A permuted block randomization schedule with varying block sizes was used, stratified by clinical site. The research pharmacist at each site provided the blinded study drugs in 2 tamper-evident bottles. All clinical investigators, research nurses, and patients were blinded to treatment assignments until all patients had completed follow-up. Outcomes The primary outcome was the change in the NIH-CPSI total score from baseline to 6 weeks. The NIH-CPSI was administered at each of the 2 baseline screening visits, 1 to 3 weeks apart, and every 3 weeks thereafter until 12 weeks. The average of the 2 scores before randomization was used as the baseline score. Evaluation of the responsiveness of the NIH-CPSI indicates that a 4-point change on a scale of 0 to 43 points represents a difference detectable by the patient. Secondary outcomes included changes in the pain, voiding, and quality-of-life subscales of the NIH-CPSI; physical and mental summary scores on the Medical Outcomes Study 12-Item Short-Form Health Survey (16); and a 7-point patient-reported global response assessment. Responders for the global response assessment were defined as men reporting that they were markedly improved or moderately improved at 6 weeks compared with baseline. Men for whom the global response assessment was missing were considered nonresponders and were included in the denominator for the assessment of response rates. Adverse events were monitored throughout the study and graded according to the National Cancer Institute Common Toxicity Criteria (ctep.cancer.gov/reporting/ctc.html). Patients were asked at each contact to report any adverse events that had occurred since the previous contact. The questions were open-ended, and researchers did not ask about any specific categories of adverse events. All events, regardless of whether they were expected reactions to the study drugs, were recorded. Attribution to treatment was also assessed. However, because it was difficult to determine whether certain adverse events, such as pain, were related to treatment or to CP/CPPS, all events were analyzed. Statistical Analysis For each of the 2 primary treatment comparisons, the recruitment goal of 184 patients provided 80% power, at a 2-sided significance level of 5%, to detect a 4-point treatment difference in the NIH-CPSI total score between baseline and 6 weeks. We recognized that although patients could detect this difference, most might not perceive it as a major improvement. However, we did not want to miss even a minor change in


The American Journal of Surgical Pathology | 1997

Primitive neuroectodermal tumor of the kidney - Another enigma: A pathologic, immunohistochemical, and molecular diagnostic study

Edith F. Marley; Helen Liapis; Peter A. Humphrey; Robert B. Nadler; Cary Lynn Siegel; Xiaopei Zhu; Jon M. Brandt; Louis P. Dehner

Purpose: Chronic Prostatitis, or Chronic Pelvic Pain Syndrome [CPPS], is a common disorder characterized by pelvic pain and varying degrees of inflammation in expressed prostatic secretions (EPS). In search of markers to more clearly define CPPS, we compared proinflammatory cytokines interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) levels in EPS from men with CPPS, to healthy men and men with Benign Prostatic Hyperplasia (BPH).Methods: 78 men: controls (n = 16), BPH (n = 14), CPPS IIIA [≥10 white blood cells per high power field (WBC/hpf) in EPS] (n = 18), CPPS IIIB [<10 WBC/hpf in EPS] (n = 20), and asymptomatic inflammatory prostatitis (AIP) (n = 10) were evaluated for EPS WBC, and IL-1β and TNF-α by ELISA.Results: IL-1β and TNF-α levels in EPS were usually detectable in men with CPPS IIIA (89% and 45%, respectively) or AIP (90%; 100%), but less often in controls (31%; 17%), BPH (57%; 15%), and CPPS IIIB (35%; 15%) respectively. IL-1β and TNF-α levels were higher in CPPS IIIA versus CPPS IIIB,...


The Journal of Urology | 1996

Acucise Endopyelotomy: Assessment of Long-term Durability

Robert B. Nadler; Ganesh S. Rao; Margaret S. Pearle; Stephen Y. Nakada; Ralph V. Clayman

BACKGROUND In men with chronic prostatitis-chronic pelvic pain syndrome, treatment with alpha-adrenergic receptor blockers early in the course of the disorder has been reported to be effective in some, but not all, relatively small randomized trials. METHODS We conducted a multicenter, randomized, double-blind, placebo-controlled trial to evaluate the efficacy of alfuzosin, an alpha-adrenergic receptor blocker, in reducing symptoms in men with chronic prostatitis-chronic pelvic pain syndrome. Participation in the study required diagnosis of the condition within the preceding 2 years and no previous treatment with an alpha-adrenergic receptor blocker. Men were randomly assigned to treatment for 12 weeks with either 10 mg of alfuzosin per day or placebo. The primary outcome was a reduction of at least 4 points (from baseline to 12 weeks) in the score on the National Institutes of Health Chronic Prostatitis Symptom Index (NIH-CPSI) (range, 0 to 43; higher scores indicate more severe symptoms). A 4-point decrease is the minimal clinically significant difference in the score. RESULTS A total of 272 eligible participants underwent randomization, and in both study groups, 49.3% of participants had a decrease of at least 4 points in their total NIH-CPSI score (rate difference associated with alfuzosin, 0.1%; 95% confidence interval, -11.2 to 11.0; P=0.99). In addition, a global response assessment showed similar response rates at 12 weeks: 33.6% in the placebo group and 34.8% in the alfuzosin group (P=0.90). The rates of adverse events in the two groups were also similar. CONCLUSIONS Our findings do not support the use of alfuzosin to reduce the symptoms of chronic prostatitis-chronic pelvic pain syndrome in men who have not received prior treatment with an alpha-blocker. (ClinicalTrials.gov number, NCT00103402.)


Journal of The National Comprehensive Cancer Network | 2016

NCCN Guidelines Insights: Prostate Cancer Early Detection, Version 2.2016

Peter R. Carroll; J. Kellogg Parsons; Gerald L. Andriole; Robert R. Bahnson; Erik P. Castle; William J. Catalona; Douglas M. Dahl; John W. Davis; Jonathan I. Epstein; Ruth Etzioni; Thomas A. Farrington; George P. Hemstreet; Mark H. Kawachi; Simon P. Kim; Paul H. Lange; Kevin R. Loughlin; William T. Lowrance; Paul Maroni; James L. Mohler; Todd M. Morgan; Kelvin A. Moses; Robert B. Nadler; Michael A. Poch; Charles D. Scales; Terrence M. Shaneyfelt; Marc C. Smaldone; Geoffrey A. Sonn; Preston Sprenkle; Andrew J. Vickers; Robert W. Wake

OBJECTIVES Pelvic floor tension myalgia may contribute to the symptoms of male patients with chronic pelvic pain syndrome (CPPS). Therefore, measures that diminish pelvic floor muscle spasm may improve these symptoms. Based on this hypothesis, we enrolled 19 patients with CPPS in a 12-week program of biofeedback-directed pelvic floor re-education and bladder training. METHODS Pre-treatment and post-treatment symptom assessments included daily voiding logs, American Urological Association (AUA) symptom score, and 10-point visual analog pain and urgency scores. Pressure-flow studies were obtained before treatment in most patients. Instruction in pelvic floor muscle contraction and relaxation was achieved using a noninvasive form of biofeedback at biweekly sessions. Home exercises were combined with a progressive increase in timed-voiding intervals. RESULTS Mean age of the 19 patients was 36 years (range 18 to 67). Four patients completed less than three treatment sessions, 5 patients completed three to five sessions, and 10 attended all six sessions. Mean follow-up was 5.8 months. Median AUA symptom scores improved from 15.0 to 7.5 (P = 0.001), and median bother scores decreased from 5.0 to 2.0 (P = 0.001). Median pain scores decreased from 5.0 to 1.0 (P = 0.001), and median urgency scores decreased from 5.0 to 2.0 (P = 0.002). Median voiding interval increased from 0.88 hours to 3.0 hours (P = 0.003). Presence of detrusor instability, hypersensitivity to filling, or bladder-sphincter pseudodyssynergia on pretreatment urodynamic studies was not predictive of treatment results. CONCLUSIONS This preliminary study confirms that a formalized program of neuromuscular re-education of the pelvic floor muscles together with interval bladder training can provide significant and durable improvement in objective measures of pain, urgency, and frequency in patients with CPPS.

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Kimberly A. Roehl

Washington University in St. Louis

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