Publications by authors named "Dong Soo Ryu"

Background: Several studies have reported patient-related risk factors for late rectal bleeding following conventionally fractionated radiotherapy for prostate cancer. We investigated patient-related risk factors for late rectal bleeding after hypofractionated radiotherapy.

Methods: A total of 231 patients with local or locally advanced prostate cancer treated with hypofractionated radiotherapy (70 or 67.

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Purpose: Urologic diseases affected by testosterone can be associated with smaller penis size compared to the normal population. We sought to compare penile length in children with unilateral cryptorchidism and normative data from a cohort of healthy Korean boys.

Materials And Methods: This study was performed in 259 Korean boys (212, normal cohort; 47, cryptorchidism) aged 6-24 months, each of whom had been brought to an outpatient clinic at one of five tertiary hospitals (Gyeongsangnam-do Province) between April 2014 and June 2015.

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We investigated the efficacy and tolerability of solifenacin 5 mg fixed dose in children with newly diagnosed idiopathic overactive bladder (OAB). A total of 34 children (male/female patients = 16/18) aged under 13 years (mean age: 7.2 ± 2.

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There has been a great improvement in height and weight of Korean children owing to economic development over the last 25 years. This study aimed to evaluate the penile length of Korean children today and to compare it with a previous Korean study reported in 1987. The cross-sectional study was conducted with 909 Korean boys aged 0-14 years who had been brought to outpatient clinics of five tertiary hospitals (Busan, Ulsan, and Changwon) between September 2013 and May 2015.

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Objectives: To determine the molecular events related to penile erection in the corpus cavernosum tissue of mice after electrical stimulation of the cavernous nerve.

Methods: Twelve-week-old male C57BL/6 mice were used in this study. Electrical stimulation of the cavernous nerve was carried out to induce penile erection.

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Purpose: We examined whether and how Sac-1004, a vascular leakage blocker, would restore erectile function in an animal model of diabetic erectile dysfunction.

Materials And Methods: Eight-week-old C57BL/6J mice were used. Diabetes was induced by intraperitoneal injection of streptozotocin.

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Introduction And Hypothesis: Although there is no consensus on the management of persistent or recurrent stress urinary incontinence (SUI) after placement of a midurethral synthetic sling (MUS), a repeat MUS procedure is commonly performed with favorable results. The aim of this study was to evaluate the efficacy of a repeat MUS procedure compared to the primary procedure in women with SUI, and to investigate factors associated with the failure of the repeat procedure.

Methods: We retrospectively analyzed data from 53 women who underwent a repeat MUS procedure and 102 women who underwent a primary MUS procedure at a single center.

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Purpose: To examine the impact of lower urinary tract symptoms (LUTS) on health-related quality of life (HRQoL) in Korean men aged ≥40 years.

Methods: A population-based, cross-sectional door-to-door survey was conducted among men aged ≥40 years. Individuals with LUTS were defined as men reporting at least one LUTS using 2002 International Continence Society definitions.

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Purpose: Stress is associated with depression, which induces many psychiatric disorders. Serotonin, also known as 5-hydroxy-tryptamine (5-HT), acts as a biochemical messenger and regulator in the brain. It also mediates several important physiological functions.

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Purpose: Anogential distance (AGD) and the 2:4 digit length ratio appear to provide a reliable guide to fetal androgen exposure. We intended to investigate the current status of penile size and the relationship between penile length and AGD or digit length according to birth weight in Korean newborn infants.

Materials And Methods: Between May 2013 and February 2014, among a total of 78 newborn male infants, 55 infants were prospectively included in this study.

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Purpose: Electroporation is known to enhance the efficiency of gene transfer through a transient increase in cell membrane permeability. The aim of this study was to determine the optimal conditions for in vivo electroporation-mediated gene delivery into mouse corpus cavernosum.

Materials And Methods: Diabetes was induced in C57BL/6 mice by intraperitoneal injections of streptozotocin.

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Objectives: To investigate bacterial infection in the seminal vesicles by bacteriological examination and radionuclide imaging in men with chronic prostatitis.

Methods: The study included 50 patients with chronic prostatitis who showed hot uptake in seminal vesicles on Tc-99m ciprofloxacin imaging and eight patients who did not show hot uptake. The evaluation included the National Institutes of Health Chronic Prostatitis Symptom Index and four-glass test.

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Endoscopic treatment of vesicoureteral reflux (VUR) is feasible in pediatric patients. As endoscopic injection has a lower success rate than ureteral reimplantation, a postoperative voiding cystourethrogram (VCUG) is usually performed. The present study evaluated whether the presence of a nodule on noninvasive ultrasound could predict the resolution of VUR and replace invasive VCUG.

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Transforming growth factor-β1 (TGF-β1) has been identified as one of the most important fibrogenic cytokines associated with Peyronie's disease (PD). The mothers against decapentaplegic homolog 7 (SMAD7) is an inhibitory Smad protein that blocks TGF-β signaling pathway. The aim of this study was to examine the anti-fibrotic effect of the SMAD7 gene in primary fibroblasts derived from human PD plaques.

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We investigated the efficacy and tolerability of various anticholinergics in Korean children with non-neurogenic overactive bladder (OAB). A total of 326 children (males:females= 157:169) aged under 18 yr (mean age 7.3±2.

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Objectives: This study aimed to determine whether or not a urodynamic study (UDS) is beneficial for management of pediatric nocturnal enuresis (NE), especially in pharmacoresistant monosymptomatic nocturnal enuresis (PRMNE) or severe non-monosymptomatic nocturnal enuresis (NMNE) patients.

Methods: Children with PRMNE or severe NMNE who underwent a UDS for the process of NE treatment were retrospectively reviewed. The UDS findings of patients and treatment outcomes of subsequent tailored therapies according to the UDS findings were analyzed.

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Objective: To investigate the effect of extracorporeal magnetic stimulation (EMS) on symptoms of chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) in men who did not respond to pharmacotherapy.

Methods: Patients with chronic pelvic pain and/or voiding symptoms in the absence of urinary tract infection for at least 3 months in spite of medication were included in this study. All patients underwent EMS for 6 weeks for a total of 12 sessions.

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Article Synopsis
  • The study aimed to explore how prostate volume influences the risk of prostate cancer diagnosis in men with gradually increasing PSA levels.
  • A total of 1,035 men were analyzed, of which 116 had a rise in PSA from below to above 4 ng/mL and underwent prostate biopsy, revealing that 22.4% had prostate cancer.
  • The findings indicated that smaller prostate volumes were significantly associated with a higher risk of prostate cancer, showing that prostate volume is a crucial factor in early detection for men with elevated PSA levels.
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Pelvic organ prolapse and lower urinary tract fistulas are two disorders frequently managed in female urology. New techniques have been adapted and improved to decrease morbidity and improve clinical outcomes of these disorders. The adaptation of minimally-invasive approaches for the management of pelvic organ prolapse and lower urinary tract fistulas began with laparoscopy.

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Purpose: To investigate the relationships among the Wnt/β-catenin pathway, androgen receptor (AR), and clinicopathological factors in hormone-naïve prostate cancer.

Materials And Methods: This study was conducted with132 cases of hormone-naïve prostate cancer treated by prostatectomy and prostate needle biopsy. An immunohistochemical study using antibodies against β-catenin, matrix metalloproteinase-7 (MMP-7), and the AR was performed.

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Penile abscesses are rare, but can develop after trauma, injection therapy, or surgery of the penis, or as an unusual presentation of sexually transmitted diseases. We report a case of penile abscess in a 51-year-old diabetic man, presented 9 days after neglected penile fracture following intracavernosal injection therapy and sexual intercourse. Penile ultrasonography and surgical exploration confirmed the physical examination findings of involvement of the corpus cavernosum.

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Purpose: Studies of penile length in children have been rarely conducted. In Korea, great improvements in height and weight have been observed because of economic development over the past 25 years. We investigated the current status of penile length in Korean children and compared the results with those of a previous Korean study conducted in 1987.

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Prostatic stromal tumor of uncertain malignant potential (STUMP) is a rare neoplasm with distinctive clinical and pathological characteristics. Here we report a case of laparoscopic radical prostatectomy performed in a patient with prostatic STUMP.

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The present study aimed to assess the clinicopathological characteristics and the prognosis of renal cell carcinoma (RCC) in children. We retrospectively reviewed the medical records of 11 Korean children (7 boys and 4 girls) undergoing radical nephrectomy for RCC between September 1997 and January 2008 at our institution. Mean age at diagnosis was 12.

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