42 research outputs found
Lack of effect of intrarectal lidocaine for pain control during transrectal prostate biopsy: A randomized prospective study
Introduction and Objectives: Transrectal ultrasound guided biopsy is an essential part in the diagnosis of prostate cancer. Although this procedure is well tolerated by most patients, sometimes it can result in some uneasiness. In this randomised double-blind placebo controlled study, we evaluated the effectiveness of intrarectal lidocaine during TRUS guided biopsy
986 THE ROLE OF STENTS FOLLOWING UNCOMPLICATED URETEROSCOPY FOR IMPACTED URETERAL STONES
Preventive effect of intravesical ozone supplementation on <i>n</i>-methyl-<i>n</i>-nitrosourea-induced non-muscle invasive bladder cancer in male rats
Fenretinide therapy in prostate cancer: Effects on tissue and serum retinoid concentration.
Purpose: To examine the feasibility of using fenretinide (4-HPR) for the prevention and treatment of prostate cancer. Materials and Methods: We measured the impact of 4-HPR therapy on retinoid concentrations in vivo, in a mouse model of prostate cancer and clinically, in patients with prostate cancer who were given oral 4-HPR (200 mg/d) or placebo for 4 weeks before undergoing a radical prostatectomy. Results: Prostate tumors in mice treated with 4-HPR contained high levels of 4-HPR and of all-trams-retinoic acid (RA) and reduced levels of retinol (ROH). Patients given 4-HPR were found to have significantly higher concentrations of 4-HPR in the cancerous prostate as compared with the serum levels (463 nmol/L v 326 nmol/L; P =,049), but they were only 1/10 the levels found in mice and were far below the concentrations reported in human breast tissue. Serum and tissue ROH levels were reduced to less than half the concentrations found in untreated controls. PA concentrations in human serum and in cancerous prostates were not significantly affected by 4-HPR treatment, in contrast with the findings in mice. Conclusion: The standard oral dose of 4-HPR proposed for breast cancer (200 mg/d) achieved only modest drug levels in the prostate and is unlikely to be effective for prostate cancer prevention or treatment. Higher doses need to be explored. (C) 2000 by American Society of Clinical Oncology