[The microbiome in benign prostatic hyperplasia]. / Das Mikrobiom beim benignen Prostatasyndrom.

The advent of new high throughput sequencing technologies has paved the way for microbiome research, opening up entirely new perspectives on the complex and diverse ecosystems of the human body. One of the main findings was that it became clear that in contrast to the widely held dogma the urinary tract is not a sterile environment. As for all niches of the human body, a well-balanced microbiome is an essential part for the physiological functioning of the urinary tract and therefore it must be considered a prerequisite for health. The dysbalance of the microbiome is now seen as having a considerable impact on the pathogenesis of a plethora of diseases. Its role in benign disorders, such as interstitial cystitis, urinary urge incontinence and chronic prostatitis/chronic pelvic pain syndrome as well as participation in malignant conditions, such as prostate cancer has recently been revealed. The contribution of the urinary microbiome to the pathogenesis and progression of lower urinary tract symptoms due to benign prostatic obstruction are currently under investigation.

[Surgical treatment of benign prostatic hyperplasia-resection, vaporization or enucleation?] / Operative Therapie des benignen Prostatasyndroms ­ resezieren, vaporisieren oder enukleieren?

BACKGROUND: Benign prostatic hyperplasia (BPH) is the most common condition affecting the male lower urinary tract. Besides transurethral resection of the prostate (TURP), vaporization of the prostate and endoscopic enucleation of the prostate are available. OBJECTIVES: To provide an overview of the current status of surgical therapies for BPH. MATERIALS AND METHODS: Narrative review of the literature on the surgical treatment of BPH. RESULTS: Besides TURP, which still can be regarded as the reference technique for surgical treatment of BPH in men with a prostate volume <80 cc, greenlight laser vaporization of the prostate (GLV) and endoscopic enucleation of the prostate (EEP) are established and evidence-based alternatives. A multitude of prospective randomized trials could show comparable functional outcomes of GLV or EEP in comparison to TURP. Based on lower comorbidity and comparable outcomes, bipolar TURP rather than monopolar TURP should be regarded as the surgical reference technique. In patients with ongoing oral anticoagulation of thrombocyte aggregation inhibition, GLV provides high intra- und postoperative safety. Endoscopic enucleation of the prostate is the only transurethral surgical method which provides high level evidence concerning safety and efficacy in patients with prostates >80 cc. CONCLUSIONS: Choice of surgical treatment of BPH should be individualized and based on prostate size, comorbidities and surgical experience.

[Transurethral resection of the prostate]. / Die transurethrale Resektion der Prostata.

Symptoms related to benign prostatic hyperplasia (BPH) are the most common reason why patients consult a urologist. Despite the rise of new minimally invasive technologies, transurethral resection of the prostate (TURP) remains the most commonly used procedure (at 84 %) to treat BPH patients in Germany. The continued popularity of this procedure can be explained by three main reasons: a robust, simple technique, an until now unsurpassed efficacy and-with regard to the risk-benefit ratio-a low morbidity. Following TURP, the mean Qmax is 19-20 ml/s and the mean IPSS is 6. BPH recurrence occurs in 2-7 % of patients within 8-22 years following TURP. Regarding clinical efficacy, meta-analyses now show relevant differences between monopolar and bipolar (B) TURP. However, B­TURP seems to be favourable considering potential complications. Clot retention with an incidence of 1-5 % is the most common acute complication and urethral strictures with an incidence of 2-9 % are the most common long-term complications of TURP. TUR syndrome is nowadays a clinical rarity. However, many complications can be avoided by a proper resection technique. TURP is still the standard in surgical BPH therapy.

Reduction of obstruction related bladder overactivity by the guanylyl cyclase modulators BAY 41-2272 and BAY 60-2770 alone or in combination with a phosphodiesterase type 5 inhibitor.

AIMS: To assess the urodynamic effects of soluble guanylyl cyclase (sGC) stimulator, BAY 41-2272, and activator, BAY 60-2770, (which both are able to induce cGMP synthesis even in the absence of nitric oxide (NO)) alone or in combination with a phosphodiesterase type 5 (PDE5) inhibitor, vardenafil, in a model of partial urethral obstruction (PUO) induced bladder overactivity (BO). METHODS: Fifty-six male Sprague-Dawley rats were used, 31 of them underwent PUO. Fourteen rats were used for Western blots to assess PDE5 and sGC expression. For drug evaluation cystometry without anesthesia was performed three days following bladder catheterization. RESULTS: Obstructed rats showed higher micturition frequency and bladder pressures than non-obstructed animals (Intermicturition Interval, IMI, 2.28 ± 0.55 vs. 3.60 ± 0.60 min (± standard deviation, SD); maximum micturition pressure, MMP, 70.1 ± 8.0 vs. 48.8 ± 7.2 cmH2O; both P < 0.05). In obstructed rats vardenafil, BAY 41-2272, and BAY 60-2770 increased IMI (2.77 ± 1.12, 2.62 ± 0.52, and 3.22 ± 1.04 min; all P < 0.05) and decreased MMP (54.4 ± 2.8, 61.5 ± 11.3, and 51.2 ± 6.3 cmH2O; all P < 0.05). When vardenafil was given following BAY 41-2272 or BAY 60-2770 no further urodynamic effects were observed. PDE5 as well as sGC protein expression was reduced in obstructed bladder tissue. CONCLUSIONS: Targeting sGC via stimulators or activators, which increase the levels of cGMP independent of endogenous NO, is as effective as vardenafil to reduce urodynamic signs of BO. Targeting the NO/cGMP pathway via compounds acting on sGC might become a new approach to treat BO.

[Prepuce as free transplant]. / Präputialhaut als freies Transplantat.

Graft urethroplasty using free transplants has become a standard procedure in the therapy of complicated urethral strictures. Various types of tissues can be used as graft material and different criteria are important for the suitability of tissues for urethroplasty. It was recognized early on that the prepuce was an easy to harvest tissue with low morbidity and excellent functional results. In this article the suitability of this tissue for functional results will be discussed within the context of the biology of free transplants and the available literature.

[Management of urethral strictures: practical guidelines]. / Management von Harnröhrenstrikturen : Ein praktischer Leitfaden.

For the diagnosis of urethral strictures it is of utmost importance to determine the exact position and length of the strictured area. The optimal method for this purpose is retrograde urethrography which can be combined with a voiding cystourethrography. Endoscopic treatment of urethral strictures is only reasonable for cases with short segment bulbar strictures (<1.5 cm) otherwise recurrence rates are very high. For long segment or recurrent strictures only open urethroplasty provides good results in terms of recurrence-free survival. In these open techniques care must be taken in early postoperative management to obtain the best results.

Detection of prostate cancer with complexed PSA and complexed/total PSA ratio - is there any advantage?

OBJECTIVE: To evaluate the performance of total PSA (tPSA), the free/total PSA ratio (f/tPSA), complexed PSA (cPSA) and the complexed/total PSA ratio (c/tPSA) in prostate cancer detection. METHODS: Frozen sera of 442 patients have been analysed for tPSA, free PSA (fPSA) and cPSA. 131 patients had prostate cancer and 311 patients benign prostatic hyperplasia. RESULTS: Differences in the distribution of the biomarkers were seen as follows: tPSA, cPSA and c/tPSA were significantly higher in the PC group, and f/tPSA was significantly higher in the BPH group. In the tPSA-range of 0-4 ng/ml none of the biomarkers showed a significant difference in the distribution between both groups. In the tPSA-ranges of 0-10 ng/ml, 2-10 ng/ml, 4-10 ng/ml and <10 ng/ml, f/tPSA showed the highest specificity at high sensitivtities, followed by c/tPSA, cPSA, and tPSA, respectively. In tPSA-ranges greater than 10 ng/ml, cPSA offered the best discriminatory ability. CPSA compared to tPSA offered better specificity at high sensitivities in all tPSA-ranges. CONCLUSION: F/tPSA offers the best ability to distinguish between both groups in lower tPSA-ranges, followed by c/tPSA. CPSA compared to tPSA offers a better ability to discriminate between both groups in all PSA-ranges and could be used as an initial test for PC.

Detecting lymph nodes metastasis in prostate cancer through extended vs. standard laparoscopic pelvic lymphadenectomy.

INTRODUCTION/OBJECTIVE: Pelvic lymphadenectomy is the best method for staging localized prostate cancer. There is no consensus about how the pelvic lymphadenectomy should be performed for patients with cT2, Gleason score 7 or higher, PSA higher than 10 ng/mL. Scintigraphic studies of prostate lymph drainage show that many lymph nodes are not dissected according to the current recommendation of lymphadenectomy which could explain the high rate of cancer recurrence. The objectives of this work are an analysis of the local lymph node metastasis according to the preoperative data (digital examination, PSA and Gleason score) and a comparison between laparoscopic extended and limited pelvic lymphadenectomy, for staging, their technique and complications. METHODS: Two groups were created for analysis. The indications for laparoscopic pelvic lymph-adenectomy are the following: preoperative PSA 10 ng/mL or higher, Gleason score 7 or higher and/or digital examination cT2. Patients with suspected distant metastasis were excluded. The first group is composed of the patients who under-went a limited laparoscopic pelvic lymphadenectomy (LLPL) between January 1995 and December 2002. The medical data were analyzed retrospectively. The second group was created with patients who received extended laparoscopic pelvic lymphadenectomy (ELPL). These data were consecutively collected between November 2006 and October 2007. LLPL was the extraction of the external iliac and obturator lymph nodes. ELPL included, additionally, dissection of the internal iliac lymph nodes as well as tissue medial to the genitofemoral nerve. Histopathological findings were compared with serum PSA, histopathological stage and preoperative biopsy. Complications, operating time, and number of extracted lymph nodes were also compared. RESULTS: There were no significant differences in age, serum PSA or mean biopsy Gleason between two groups. The first group (LPLL) is composed of 381 patients and the second (ELPL), 163. The mean operating time was 72.5 minutes for LLPL and 84.3 for ELPL. The mean number of lymph nodes extracted was 13.8 (LLPL) and 31.1 (ELPL). Metastases were detected in 18.8% (LLPL) and 24.7% (ELPL). In 37.5% of cases, the metastasis occurred in lymph nodes outside from those dissected by LPLL. The rates of complications and conversion rate were not significantly different for the two groups. CONCLUSIONS: For patients with clinically localized prostate cancer, ELPL is associated with a higher rate of detection of lymph node metastasis outside of the field dissected in the LPLL. Pelvic lymphadenectomy, especially extraction of the lymph nodes of the internal iliac is important in patients with preoperative Gleason score 7 or greater and/or serum PSA greater than 10 ng/mL. Laparoscopic lymphadenectomy does not augment the rate of complications and is an excellent technique in prostate cancer staging.

[Joint logbook of the GeSRU, DGU, and BDU for "Urological Continuing Education": a milestone for urological continuing education in Germany]. / Das gemeinsame Logbuch "Urologische Weiterbildung" von GeSRU, DGU und BDU : Ein Meilenstein für die urologische Weiterbildung in Deutschland.

Since the new Regulation on Continuing Education took effect, documentation of continuing education is obligatory. At the beginning of 2007, the German Society of Residents in Urology (GeSRU) together with the German Society of Urology (DGU) represented by Professor J. Fichtner initiated a project group with the goal of enhancing the transparency of urological continuing education, modernizing it, and implementing the new possibilities afforded by the new regulation on a nationwide level. Towards realizing this project, which was joined by the Federation of German Urologists (BDU) and the Working Group of Hospital Chiefs of Staff, a joint logbook was designed. In contrast to previously obtainable logbooks, the joint logbook offers, in addition to straightforward documentation of continuing education, a definitive, clear interview guide based on objective data analysis. It provides training in agreeing on sensible objectives, it contains a model curriculum in which continuing education can be systematically yet flexibly structured, and beyond the requirements needed for obtaining qualification as a specialist includes those entitling the physician to bill health insurance providers for urological services rendered as a private practitioner. The joint logbook is accepted as an all-in-one continuing education unit record by the medical associations, health insurance providers, and the European Board of Urology. It takes the form of a dual concept and is available in hard copy as a loose-leaf binder and in a constantly updated online version (http://www.germanresidents-urolog.de).