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Periodontitis and benign prostatic hyperplasia and prostatitis

Prostate disease is one of the most common urological disease. A large number of studies have shown that prostate disease is related to changes in the local microenvironment. Periodontitis is a chronic inflammatory disease characterized by the destruction of periodontal tissue caused by a variety of pathogenic microorganisms. Its pathogenesis may involve many factors. Periodontitis may have adverse effects on cardiovascular, respiratory, digestive and endocrine systems. Recent studies have found that chronic periodontitis is associated with the occurrence and development of benign prostatic hyperplasia and prostatitis, but the relationship is not clear. Therefore, further research is needed. This article elaborates on inflammation and benign prostatic hyperplasia and prostatitis, periodontitis and prostatitis, and periodontitis and benign prostatic hyperplasia, aiming to provide certain ideas for clinical research and diagnosis and treatment.

Surgeon and Evidence-based Medicine

CLINICAL EFFECT OF PEDICLED SCROTAL SEPTAL FLAP URETHROPLASTY ON LONG-SEGMENT POSTERIOR URETHRAL STRICTURE

Objective To investigate the therapeutic effect of pedicled scrotal septal flap urethroplasty on longsegment posterior urethral stricture and to assess its appl ication value. Methods From January 2003 to December 2007, 24 patients (age range, 6-54 years old) with long-segment urethral stricture underwent pedicled scrotal septal flap urethroplasty.The duration of the disease was 1-5 years. The stricture was caused by traumatic urethral injury or disruption in 22 cases,postoperative compl ication of suprapubic transvesical prostatectomy in 1 case, and recurrent urethral infection due to long-term indwell ing urinary catheter in 1 case. Urethroscopy or cystourethrography examination confirmed that all cases had urethral stricture 2.0-5.5 cm in length. Eleven cases were compl icated with urethral false passage, 6 with urethral fistula, 2 with intestinal fistula, and 6 with erectile dysfunction. The result of excretion urography of bilateral upper urinary tracts was negative in all cases. Pedicled scrotal septal flap 2.5 cm × 2.0 cm-6.5 cm × 2.5 cm in size was harvested during operation, and urethroplasty was performed. Results Volume of blood loss during operation was 100-500 mL (average 270 mL). The operative time was 90-220 minutes (average 135 minutes). All flaps survived. All wounds healed by first intention. All patients had normal urination after operation. Over the follow-up period of 12-36 months (average 18.6 months), 1 of the 24 patients suffered from urinary incontinence, 2 from urethral stricture, 1 from urethral stricture and urethral fistula, and 1 from urethral diverticulum around the distal anastomosis. Those patients got normal urination after symptomatic treatment. No urethral stone, urinary incontinence, and new case of erectile dysfunction occurred. The maximum urinary flow rate 16 months after operation was 14-21 mL/s (average 17.6 mL/s). Voiding cystourethrography 22 months after operation showed unblocked urinary tract and no formation of stricture and fistula. Conclusion Pedicled scrotal septal flap urethroplasty, featured by simple operative method, easy flap harvest, and high survival rate of flap, is one of safe and effective methods for treating long-segment posterior urethral stricture.

良性前列腺增生症与组织炎症

Large trials vs meta analysis of smaller trials

In the absence of large trials, it is important for us to discuss whether a well-conducted meta-analysis of smaller randomized controlled trial (RCT) can replace large trials or not. We have evaluated the quality of original literature and methodological quality. The difference between meta-analysis of smaller RCT and the largest randomized trials have also discussed.

间充质干细胞与肿瘤关系的研究进展

近年来许多研究发现间充质干细胞（mesenchymal stem cells，MSC）具有向肿瘤部位趋化并对肿瘤细胞的增殖、侵袭甚至转移发挥直接或间接的促进作用；然而 MSC 的这些肿瘤原特性仍有待考证，甚至有可能发展为对肿瘤细胞相反的作用。MSC 对肿瘤细胞亦敌亦友：一方面，MSC 可以通过调节免疫监视、肿瘤细胞生长和血管生成来促进肿瘤发展；另一方面，MSC 可以依靠抑制信号通路来抑制肿瘤细胞生长。同时，由于 MSC 具有向肿瘤部位“归巢”和分泌细胞因子的特性，还被认为是一种理想的基因治疗载体。该文就 MSC 与肿瘤相互关系的近期研究进行了综述。

CELLULAR THERAPY OF STRESS URINARY INCONTINENCE

【Abstract】 Objective To review the progress and cl inical appl ication of cellular therapy for stress urinaryincontinence (SUI). Methods The l iterature about cellular therapy of SUI was extensively reviewed. Results Becauseof having no or poor regeneration capacity, the cl inical application of chondrocytes and myoblasts were l imited. Based on the rapid progress in stem cell biology, an increasing number of animal experiments and cl inical trials about cellular therapy of SUI have been reported with encouraging results. All these show that cellular therapy has great potential in cl inical application. Stem cells are considered as ideal seeded-cells for treatment of SUI. Conclusion Cellular therapy, especially stem cells, provides a novel approach for treatment of SUI, but the mechanism needs further study.

Meta-analysis of Finasteride for Perioperative Bleeding in Patients Undergoing Transurethral Resection of Prostate

Objective　To assess the efficacy of finasteride in treating perioperative bleeding in patients undergoing transurethral resection of the prostate (TURP). Methods　We searched MEDLINE (1966 to 2005), EMBase (1984 to 2004), CBM (1980 to 2005), The Cochrane Library (Issue 4, 2005) and relevant journals to identify cl inical trials involving finasteride in patients undergoing TURP. We also checked the references in the reports of each included trial. The qual ity of randomized controlled trials (RCTs) was assessed according to the methods recommended by The Cochrane Collaboration, and the qual ity of non-RCTs was assessed based on the methods recommended by Jiang-ping Liu, Stroup and Hailey. Two reviewers extracted data independently and data analyses were conducted with The Cochrane Collaboration’ s RevMan 4.2. Result　We included 4 RCTs and 1 non-RCT. The qual ity of 3 RCTs was graded C and the other one was graded B. The quality of the non-RCT was relatively high. Meta-analyses showed that with comparable age, international prostate symptom score, prostate specific antigen, preoperative volume of prostate and excision volume between the two groups (Pgt;0.05), the perioperative bleeding volume (WMD –85.44, 95%CI –117.31 to –53.58), the bleeding volume per gram of resected prostate tissue (WMD –3.5, 95%CI –6.34 to –0.58) and hemoglobin reduction (WMD –1.61, 95%CI –1.96 to –1.26) of the finasteride group were significantly smaller than those of the control group. Conclusion　The evidence currently available indicates that preoperative use of finasteride may reduce bleeding in patients undergoing TURP.

A Systematic Review of Epirubicin for Prevention of Postoperative Recurrence of Superficial Bladder Cancer

Objective　To assess the efficacy and the treatment-induced side effects of intravesically administered Epirubicin (EPI) following TUR in patients with Ta and T1 superficial bladder cancer compared to TUR alone. Methods　According to the Cochrane reviewer’s handbook, included studies were those on patients with histologically confirmed Ta and T1 bladder cancer. EPI and EPI derivatives, dose and schedule would be considerd appropriate for inclusion. The search strategy was developed according to the Collaborative Review Group search strategy. Medline, EMbase, CBMdisc and the Cochrane library, articles of conference proceedings, and academic collections were searched for randomised controlled trials (RCTs) and quasi-RCT comparing intravesical EPI following TUR with TUR alone. Data were extracted from each identified paper independently by two reviewers. Trials were assessed for quality according to the method of Jadad scale. RevMan4.2 software developed by the Cochrane Collaboration was used for satistical analysis. Results　Two hundred and thirteen related articles were identified, but only 10 were included in our systematic review. 3 articles were high quality and the rest were low. The pooled RR=1.51 (95%CI 1.32 to 1.72) and the pooled RR=1.49 (95%CI 1.35 to 1.66) in patients with Ta and T1 bladdercancer at 1 and 2 years respectively; The pooled RR=1.34 (95%CI 1.22 to 1.48) when comparing relative efficacy of intravesical EPI (drug doselt;50 mg) following TUR with TUR alone; The pooled RR=1.63 (95%CI 1.48 to 1.79) when comparing relative efficacy of intravesical EPI (drug dosegt;50 mg) following TUR with TUR alone. RR=1.49 (95%CI 1.33 to 1.66) and RR=1.56 (95%CI 1.36 to 1.84) when comparing relative efficacy of single intravesical EPI following TUR with TUR alone respectively. RR=0.79 (95%CI 0.53 to 1.17) when comparing the incidence of disease progression of intravesical doxorubicin following TUR with TUR alone. RR=4.34 (95%CI 2.62 to 7.19) when comparing side effect of intravesical EPI following TUR with TUR alone. Conclusions　Intravesically administered EPI following TUR in patients with Ta and T1 superficial bladder cancer may reduce the incidence of tumour recurrence, but cannot reduce the incidence of disease progreesion. Intravesically administered EPI following TUR has some side effects but can be tolerated and has no influence on the life of patients.

Comparison of Retroperitoneal Laparoscopic and Open Decortication of Renal Cysts

目的:评估经后腹腔镜与开放肾囊肿去顶减压术的临床价值。方法:回顾性调查四川大学华西医院2004年4月至2008年4月468例经后腹腔镜肾囊肿去顶减压术(A组)和2003年4月至2008年4月121例开放肾囊肿去顶减压术(B组)的临床资料并进行比较,统计分析两种术式术前,术中和术后的数据资料,比如性别、年龄、侧别、囊肿直径、手术时间、术中出血量、术后下床时间、肛门排气时间、引流管拔除时间、术后住院天数、总住院天数等。开放手术均行肋缘下切口,经后腹腔镜均行腰部常规3孔穿刺。结果:所有手术均获成功。A组手术时间5318±095分,术中出血628±033mL,术后肛门排气时间2518±030h,术后下床时间3102±022h,引流管拔除时间2715±020h,术后住院490±007d,总住院895±012d;B组手术时间6772±148分,术中出血5116±077mL,术后肛门排气时间2691±033h,术后下床时间4331±103h,引流管拔除时间2963±079h,术后住院788±018d,总住院125±029d。术前两组基线对比无统计差异。A组手术时间、术中出血量、术后下床时间、总住院天数和术后住院天数均优于B组,差异具有统计学意义(Plt;001)。术后肛门排气时间及引流管拔除时间无显著性差异(Pgt;005)。结论〓:后腹腔镜肾囊肿去顶术在手术时间、术中出血量和术后下床时间等方面明显优于开放手术。