Publications by authors named "Ronny B Tan"

Erectile dysfunction (ED) is a common sexual problem affecting many men irrespective of cultures, beliefs and nationalities. While medical therapy for ED has been revolutionized by the advent of oral phosphodiesterase type 5 inhibitors and intracavernosal injection of vasoactive agents, recent technological advances such stem cell therapy, low intensity shock wave and newer generation of penile prosthesis implant offer hope to men who do not respond to conventional medical therapy. In contrast, traditional and complementary medicine (TCM) focuses on the restoration and better overall bodily regulation with the use of various herbal and animal products as well as exercises to invigorate (energy) in vital organs.

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Peyronie's disease is a disfiguring and psychologically devastating disease, which continues to pose a significant clinical conundrum to the attending doctor. Many forms of therapy have been trialled but results have been inconsistent at best. Non-surgical therapy revolves around oral, intralesional and shockwave therapies.

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Purpose: We sought to develop a reproducible TGF-β1 injection technique to induce urethral fibrosis in the rat urethra.

Materials And Methods: A total of 32 male Sprague Dawley® rats weighing 300 to 350 gm were anesthetized with ketamine/xylazine intraperitoneally. Using a 5 mm penoscrotal incision the rat urethra was exposed.

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Introduction: Late-onset hypogonadism, lower urinary tract symptoms (LUTS) due to benign prostatic enlargement (BPE), and prostate cancer commonly coexist in the aging male. Due to a better understanding of the physiology and impact of testosterone on benign and malignant diseases of the prostate, the view toward testosterone replacement therapy (TRT) in these individuals has changed dramatically over time.

Aim: This communication evaluates the effects of testosterone on benign prostatic growth and prostate cancer and reviews the evidence for TRT for men with BPE and prostate cancer.

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The treatment modalities of erectile dysfunction range from oral pharmacotherapy to intracavernosal injections, intraurethral pellets, vacuum erectile devices, and the surgical option of penile prosthesis insertion. Oral phosphodiesterase 5 inhibitors still remain the preferred treatment for patients since they are the least invasive, not to mention that they can be prescribed by non-urologists. Due to these factors, there has been development of newer drugs with fewer side effects.

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The treatment of Peyronie's disease (PD) is a challenge for the clinician. In the quest to straighten the penis, alleviate pain, prevent further shortening, and restore erectile function, many non-surgical treatments have been offered in lieu of an operative approach, which is still considered the gold standard for definitive treatment. This communication is an update on the different approaches used in the minimally invasive management of this frustrating and yet intriguing condition.

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Introduction: There is a growing interest in the treatment of late-onset hypogonadism, another name for the study of testosterone deficiency in an older age group. Initial attempts at testosterone replacement have also brought attention to the possible adverse effects on the patients' cardiovascular risk factors and their prostate health. The "female" hormone estradiol is no longer considered as the feminizing hormone, as it has been identified to have an effect on the sexual and general well-being of adult males.

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Peyronie disease is a common cause of penile deformity and sexual dysfunction. Although surgery is regarded as the definitive management for this condition, there are many medical and minimally invasive therapies available, with widely varying efficacy reported in the literature. The purpose of this review is to describe the current state-of-the-art for each of the most commonly used as well as several developing non-surgical treatments.

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