Clinical Utility of an Epigenetic Assay to Detect Occult Prostate Cancer in Histopathologically Negative Biopsies: Results of the MATLOC Study.
; ; DELVENNE, Philippe et al
in Journal of Urology (The) (2013), 189(3), 1110-1116
PURPOSE: Concern over possible false negative histopathology of prostate biopsies often leads to re-biopsy. A quantitative methylation-specific PCR (QMSP) assay panel, including GSTP1,APC and RASSF1 ... [more ▼]
PURPOSE: Concern over possible false negative histopathology of prostate biopsies often leads to re-biopsy. A quantitative methylation-specific PCR (QMSP) assay panel, including GSTP1,APC and RASSF1, could serve to increase the sensitivity to detect cancer over pathologic review alone, leading towards a high negative predictive value (NPV) and a decrease of unnecessary repeat biopsies. MATERIALS AND METHODS: The MATLOC (Methylation Analysis To Locate Occult Cancer) study blindly tested archived prostate biopsy needle core tissue samples of 498 subjects from the UK and Belgium with histopathologically negative prostate biopsies followed by either a positive (cases) or negative (controls) repeat biopsy within 30 months. The clinical performance of the epigenetic marker panel, emphasizing NPV, was assessed and cross-validated. Multivariate logistic regression was used to evaluate all risk factors. RESULTS: The epigenetic assay performed on the first, negative biopsies from this retrospective review cohort resulted in an NPV of 90% (95% CI, 87-93%). In a multivariate model, correcting for age, PSA, DRE and histopathological characteristics of the first biopsy, the epigenetic assay proved to be a significant, independent predictor of patient outcome with an odds ratio of 3.17 (95% CI, 1.81-5.53). CONCLUSIONS: A multiplex QMSP assay determining the methylation status of GSTP1,APC and RASSF1is strongly associated with the outcome of a repeat biopsy up to 30 months after an initial negative biopsy in men with suspicion of prostate cancer. The addition of this epigenetic assay could improve the prostate cancer diagnostic process and reduce unnecessary repeat biopsies. [less ▲]Detailed reference viewed: 59 (11 ULg)
The inside-out transobturator sling for the treatment of male urinary incontinence
de Leval, Jean ; Waltregny, David
in Journal of Urology (The) (2008), 179(4), 123
Introduction and objective: <br />Sling procedures are currently re-emerging as an attractive alternative to the artificial urinary sphincter for the treatment of post-radical prostatectomy (RP) stress ... [more ▼]
Introduction and objective: <br />Sling procedures are currently re-emerging as an attractive alternative to the artificial urinary sphincter for the treatment of post-radical prostatectomy (RP) stress urinary incontinence (SUI), given that they are inexpensive, nonmechanical and allow for physiological voiding without significant obstruction. The aim of this study was to describe a novel transobturator sling procedure for treating post-RP SUI, and to prospectively evaluate its short-term safety and efficacy. <br /> <br />Methods: <br />The inside-out transobturator sling technique used specific instruments and a polypropylene mesh with 2 arms that were passed inside to outside through the obturator foramens, pulled for compressing the bulbar urethra upward, and then tied to each other across the midline. Perioperative dual channel urodynamic studies were repeated until tension on both arms of the mesh increased abdominal leak point pressure to approximately 100 cm H2O. The two mesh arms were then tied to each other for maintaining bulbar urethra compression. Patients with detrusor overactivity were excluded. Baseline and followup evaluations included uroflowmetry, and continence, quality of life (QoL), and satisfaction questionnaires. Cure was defined by no pad use and improvement by a number of pads/day ≤2 and reduced by at least 50%. Complications were recorded. The video also illustrates anatomic and physiopathologic differences between male and pelvis in relation with transobturator tapes. <br /> <br />Results: <br />From April 2006 through February 2007, 20 consecutive patients suffering from post-RP SUI underwent the sling procedure using the same operative protocol. Preoperatively, 3 (15%), 11 (55%), and 6 (25%) patients were using 2, 3 to 5, and more than 5 pads/day, respectively. The procedure was preceded by an endoscopic urethrotomy in 4 patients. No perioperative complication was noted; 3 patients required suprapubic catheterization. At 6 months, 9 (45%) patients were cured and 8 others (40%) were improved (1 pad/day). QoL was significantly enhanced and 80% patients were moderately to completely satisfied with the procedure. Preoperative and postoperative max flow rate and postvoid residual values were not statistically different. No sling infection, urethra erosion, persistent pain or neurological complication was observed. <br /> <br />Conclusions: <br />The inside-out transobturator sling procedure appears to be safe and efficient at short term. Further studies are warranted to determine long term outcome. [less ▲]Detailed reference viewed: 25 (4 ULg)
Inside out transobturator vaginal tape for the treatment of female stress urinary incontinence: Interim results of a prospective study after a 1-year minimum followup
Waltregny, David ; Reul, Olivier ; et al
in Journal of Urology (The) (2006), 175(6), 2191-2195
Purpose: We analyzed the results of a prospective, observational trial designed to assess the safety and efficacy of the TVT-O procedure for female SUI. Materials and Methods: Preoperative and ... [more ▼]
Purpose: We analyzed the results of a prospective, observational trial designed to assess the safety and efficacy of the TVT-O procedure for female SUI. Materials and Methods: Preoperative and postoperative evaluations included physical examination, and urinary symptom and quality of life scale questionnaires. Results: Between March 2003 and December 2004, 253 patients with clinical and urodynamic diagnoses of SUI who fulfilled inclusion and exclusion criteria were enrolled in the trial and underwent the TVT-O procedure. No significant intraoperative complications were observed. One-year minimum followup was available on 99 of the initial 102 patients, of whom 16 had undergone concomitant pelvic organ prolapse surgical treatment. The SUI complete cure rate was 91%. No patient had vaginal or urethral erosion. Four patients required tape release or section. Frequency and urge symptoms improved after the operation (p < 0.001). The severity of obstructive symptoms slightly increased postoperatively in the group of patients who did not undergo associated pelvic organ prolapse treatment (p < 0.05), while maximum flow rates somewhat decreased (p < 0.001) and post-void residual urine volumes somewhat increased (p < 0.005). Most patients reported a significant decrease in incontinence severity and improvement in quality of life (p < 0.0001). Conclusions: The results of this study, which suggest that the TVT-O procedure is a safe and efficient surgical treatment for female SUI, warrant further comparative evaluation of this procedure with retropubic and outside in transobturator approaches in appropriately designed, prospective, randomized trials. [less ▲]Detailed reference viewed: 31 (6 ULg)
Transobturator vaginal tape inside out for the surgical treatment of female stress urinary incontinence: anatomical considerations.
Bonnet, Pierre ; Waltregny, David ; Reul, Olivier et al
in Journal of Urology (The) (2005), 173(4), 1223-8
PURPOSE: We have recently described a novel surgical technique for female stress urinary incontinence, that is the transobturator vaginal tape inside out, which uses specific instruments for the passage ... [more ▼]
PURPOSE: We have recently described a novel surgical technique for female stress urinary incontinence, that is the transobturator vaginal tape inside out, which uses specific instruments for the passage of a synthetic tape from beneath the urethra toward the thigh folds. Herein we report the results of cadaver dissection performed to determine the anatomical trajectory of the tape and its relationships with neighboring neurovascular structures and organs. MATERIALS AND METHODS: Insertion of the transobturator vaginal tape inside out tape was performed by different surgeons in 12 freshly frozen female cadavers according to the standard procedure. The thigh, obturator, perineal and pelvic regions were dissected and tape trajectory was recorded. An additional cadaver was dissected without prior tape placement. RESULTS: The tape was inserted according to a certain consistent path, that is penetration from the suburethral space into a strictly perineal region limited medial and cranial by the levator ani muscle, caudal by the perineal membrane and lateral by the obturator internus muscle. This region corresponded to the most anterior recess of the ischiorectal fossa. The tape then perforated the obturator membrane and muscles, and exited through the skin after traversing adductor muscles and subcutaneous tissue. The tape was coursed away from 1) the dorsal nerve to the clitoris located more superficially below the perineal membrane, 2) the obturator nerve and vessels, and 3) the saphenous and femoral vessels. CONCLUSIONS: These findings strongly suggest that our transobturator technique is highly accurate, reproducible and safe, and it does not require perioperative cystoscopy. [less ▲]Detailed reference viewed: 58 (12 ULg)
Adult mullerian duct or utricle cyst: clinical significance and therapeutic management of 65 cases.
Coppens, Luc ; Bonnet, Pierre ; Andrianne, Robert et al
in Journal of Urology (The) (2002), 167(4), 1740-4
PURPOSE: We define guidelines for the exploration and treatment of adult mullerian duct cysts. MATERIALS AND METHODS: From January 1988 through September 1999 a diagnosis of enlarged prostatic utricle was ... [more ▼]
PURPOSE: We define guidelines for the exploration and treatment of adult mullerian duct cysts. MATERIALS AND METHODS: From January 1988 through September 1999 a diagnosis of enlarged prostatic utricle was made in 65 adults based on transrectal ultrasound findings. Echographic criteria to define simple versus complicated cysts were detailed. We reviewed the clinical presentation, diagnostic modalities, indications for invasive procedures and postoperative outcome. RESULTS: The usual clinical presentations were hematospermia in 40% of cases, other ejaculatory disturbances in 20%, recurrent testicular or pelviperineal pain in 33%, lower urinary tract irritation symptoms in 25%, lower urinary tract infection in 18.5%, male infertility in 12% and incidental finding in 18.5%. Cyst dimensions did not influence the indication for invasive procedures, which were performed in only 27 of the 65 patients (41.5%) to treat disabling symptoms in 28% and obstructive infertility in 5%, and investigate complicated cysts on transrectal ultrasound in 6%. These procedures included transperineal or transrectal puncture in 9 patients, simple endoscopic section of the utricle meatus in 12 and large marsupialisation in 6. Complete and sustained cure was noted in half of the patients treated with cyst puncture only, although echographic relapse was the rule. Endoscopic procedures definitely improved or cured 82% of the patients at a mean followup of 51 months, during which neither early nor late complications were noted. CONCLUSIONS: Since almost 60% of adults diagnosed with a mullerian duct cyst did not experience any cyst related symptoms or ejaculatory-fertility impairment, we recommend that investigation and/or treatment should only be done in symptomatic or infertile patients. [less ▲]Detailed reference viewed: 147 (2 ULg)
Intermittent versus continuous total androgen blockade in the treatment of patients with advanced hormone-naïve prostate cancer. Results of a randomiszed prospective multicenter clinical trial
Waltregny, David ; ; et al
in Journal of Urology (The) (2002), 167Detailed reference viewed: 29 (1 ULg)
Bone sialoprotein, bone morphogenetic protein 6 and thymidine phosphorylase expression in localized human prostatic adenocarcinoma as predictors of clinical outcome: a clinicopathological and immunohistochemical study of 43 cases.
; ; et al
in Journal of Urology (The) (2001), 166(5), 1924-30
PURPOSE: Skeletal metastases are the hallmark of advanced prostate cancer and recurrence after local surgery is common. Currently to our knowledge no biological markers predict the risk of disease ... [more ▼]
PURPOSE: Skeletal metastases are the hallmark of advanced prostate cancer and recurrence after local surgery is common. Currently to our knowledge no biological markers predict the risk of disease progression in individuals with localized prostate cancer. In a search for predictive markers we evaluated the expression of bone sialoprotein and bone morphogenetic protein 6, 2 bone related proteins, and the angiogenic factor thymidine phosphorylase. MATERIALS AND METHODS: The study population included 43 men who presented with localized prostate cancer treated with radical prostatectomy. Bone sialoprotein, bone morphogenetic protein 6 and thymidine phosphorylase expression was assessed by immunohistochemical testing. Results were analyzed in relation to pathological disease stage, Gleason score and clinical outcome. Clinical followup was 4.3 to 11.4 years after surgery (median 7.9). RESULTS: Disease did not progress in 17 of the 43 cases, while recurrence and/or metastasis developed in the other 26 at a median of 6.5 and 6.9 years, respectively. Bone sialoprotein and bone morphogenetic protein 6 expression detected in 28 (65%) and 29 (67%) of the 43 samples, respectively, was significantly associated (p = 0.0001). Thymidine phosphorylase detected in 26 samples (60%) was not related to bone sialoprotein and/or bone morphogenetic protein 6 positivity. Bone sialoprotein and/or bone morphogenetic protein 6 expression correlated with bone metastasis, while thymidine phosphorylase expression was related to local recurrence (p = 0.002 and/or 0.007, and 0.00007, respectively). On multivariate analysis only the correlation of thymidine phosphorylase expression with recurrence remained statistically significant (p = 0.002). Co-expression of the 3 markers was observed in the samples of 10 of the 11 patients (90%) with bone metastases and only in 5 of the 17 (29%) who were disease-free. CONCLUSIONS: This study indicates that the expression of bone sialoprotein, bone morphogenetic protein 6 and thymidine phosphorylase determined at a clinically early stage of disease by a simple immunohistochemical technique would enable subgroups of patients to be identified that are at different risks of bone metastasis or recurrence. Detection of such markers would provide additional prognostic information that would be useful for patients with intermediate or low Gleason score or stage disease. These patients would benefit from a more adapted clinical follow-up. [less ▲]Detailed reference viewed: 37 (3 ULg)