Experience of 100 Laparoscopic Radical Prostatectomies Performed by a Single Surgeon: An Analysis of Surgical and Functional Outcomes

PURPOSE: We analyzed the surgical and functional outcomes of 100 consecutive laparo-scopic radical prostatectomies (LRP) performed by a single surgeon. MATERIALS AND METHODS: Between October 2007 and May 2010, a total of 100 consecutive patients underwent LRP for prostate cancer at our institution. We retrospectively reviewed the medical records of these patients to determine surgical and functional results. We compared surgical and functional outcomes between three groups divided on the basis of operation period (Group 1; first 40 cases; Group 2; next 30 cases; Group 3; last 30 cases). RESULTS: The operative time decreased significantly as the surgeon's experience increased over time (P<0.01). The learning curve for operative time was surpassed after approximately 40 cases. The overall positive surgical margin (PSM) rate was 17.5% in Group 1, 16.7% in Group 2, and 10% in Group 3. For organ-confined disease, the PSM rate was 2.5%, 6.7%, and 3.3% in Groups 1, 2, and 3, respectively. The continence rate (absence of a pad) was 73.2% and the social continence rate was 94.7% at 12 months after surgery. There was a significant difference in continence (absence of pad) between the early (Group 1) and late group (Group 3) at 1, 3, and 6 months (P<0.0001). The continence rate was not affected by whether the pubic bone-anchoring procedure or the Rocco suture method was used. The overall potency rate was 16.7% and 48.6% at 6 and 12 months, respectively. For bilateral nerve-sparing cases, the potency rate was 20% and 57.1% at 6 and 12 months, respectively. CONCLUSIONS: Our surgical and functional outcomes indicate that even in this 'robotic era', LRP is still an attractive treatment option for patients with localized prostate cancer, especially in areas with limited access to surgical robots.

Erratum: Experience of 100 Laparoscopic Radical Prostatectomies Performed by a Single Surgeon: An Analysis of Surgical and Functional Outcomes

No abstract available.

Incidence and Predictive Factors of Benign Renal Lesions in Korean Patients with Preoperative Imaging Diagnoses of Renal Cell Carcinoma

The present study was performed to determine the incidence and predictive factors of benign renal lesions in Korean patients undergoing nephrectomy for presumed renal cell carcinoma on preoperative imaging. We analyzed the pathologic reports and medical records of 1,598 eligible patients with unilateral, nonmetastatic, and nonfamilial renal masses. Of the 1,598 renal masses, 114 (7.1%) were benign lesions, including angiomyolipoma in 47 (2.9%), oncocytoma in 23 (1.4%), and complicated cysts in 18 (1.1%) patients. On univariate analysis, the proportion of benign lesions was significantly higher in female patients, and in patients with smaller tumors, cystic renal masses, and without gross hematuria as a presenting symptom. When renal lesions were stratified by tumor size, the proportion of benign as opposed to malignant lesions decreased significantly as tumor size increased. On multivariate analysis, female gender, smaller tumor size, and cystic lesions were significantly associated with benign histological features. The findings in this large cohort of Korean patients show a lower incidence (7.1%) of benign renal lesions than those of previous Western reports. Female gender, cystic renal lesions, and smaller tumor size are independent predictors of benign histological features.

What Are Some New Developments in Prostate Cancer Diagnosis?

The purpose of this article is to summarize up-to-date changes and policies in the diagnosis of prostate cancer. The triads of DRE (digital rectal examination), serum PSA (prostate specific antigen), and TRUS (transrectal ultrasound) that directed prostatic biopsy have been considered a gold standard in the early detection of prostate cancer. Even though PSA is a very useful test, its low specificity has made some controversy until now. Moreover, it is not verified whether PSA screening would contribute to the decline in prostate cancer mortality. TRUS directed prostate biopsy also has some criticisms. For example, appropriate number of biopsy core, determination of whether a patient should undergo a repeat biopsy and its timing remain controversial. This article presents guidelines on prostate cancer diagnosis with partial results of randomized controlled trials to verify aforementioned criticisms Since recently published trials show different results regarding the impact of prostate cancer screening on mortality, further analyses are needed to determine the specific parameters for optimal screening (i.e. the age at which screening should begin, re-screening intervals, the age at which screening should be discontinued, and novel screening biomarkers). Unless a new and effective screening biomarker is discovered, PSA will maintain a superlative position for screening of prostate cancer. Hence, we have to find an optimal cut-off value of PSA derivatives for Korean people. With respect to prostate biopsy, current literatures support the use of more extensive biopsy techniques to increase the likelihood of prostate cancer detection.

The Role of Endorectal Magnetic Resonance Imaging in Predicting Extraprostatic Extension and Seminal Vesicle Invasion in Clinically Localized Prostate Cancer

PURPOSE: We aimed to assess the clinical value of endorectal magnetic resonance imaging (MRI) in predicting extraprostatic extension and seminal vesicle invasion in patients with clinically localized prostate cancer. MATERIALS AND METHODS: A total of 54 patients who underwent radical prostatectomy for clinically localized prostate cancer were retrospectively analyzed. The findings of endorectal MRI, performed at least 3 weeks after biopsy, were compared with the pathological results of radical prostatectomy specimens. The sensitivity, specificity, and accuracy of the detection of extraprostatic extension and seminal vesicle invasion were calculated. RESULTS: The sensitivity, specificity, and accuracy of the endorectal MRI findings were 50.0%, 82.6%, and 77.8% for the detection of extraprostatic extension, respectively, and 75.0%, 92.0%, and 90.7% for the detection of seminal vesicle invasion, respectively. The sensitivity of endorectal MRI in the detection of extraprostatic extension improved as the Gleason score increased. CONCLUSIONS: Endorectal MRI findings demonstrated modest sensitivity for predicting extraprostatic extension, whereas specificity was relatively high. In addition, endorectal MRI showed better sensitivity for detecting high-grade tumors.

Results of Microorganism Detection by Multiplex Polymerase Chain Reaction in Patients with Chronic Pelvic Pain Syndrome

PURPOSE: The aim of this study was to evaluate the results of multiplex polymerase chain reaction (PCR) in patients with chronic pelvic pain syndrome (CPPS) and the significance of microorganisms as the causative factor of CPPS. MATERIALS AND METHODS: We evaluated the frequency of 19 possible causative microorganisms of prostatitis in 849 patients who had prostatitis symptoms from April 2007 to March 2009 by using multiplex PCR. All of the enrolled patients were category III by the definition of the NIH Chronic Prostatitis Workshop. RESULTS: Of the 849 patients, 414 (49%) and 435 (51%) were categories IIIa (inflammatory CPPS) and IIIb (noninflammatory CPPS). On multiplex PCR, using the third voided urine specimen (VB3), 369 (89%) of the 414 category IIIa and 367 (84%) of the 435 category IIIb cases were found to have positive PCR results for causative microorganisms. The common microorganisms were Enterococcus, Ureaplasma urealyticum, Lactobacillus, Streptococcus agalactiae, and Chlamydia trachomatis in 173 (18%), 144 (15%), 129 (13%), 78 (8%), and 69 cases (7%), respectively. CONCLUSIONS: There were too many positive PCR results for causative microorganisms in the CPPS patients despite negative urine culture examination. Therefore, it is necessary to rule out contamination of the specimen to achieve reliable results with multiplex PCR. However, multiplex PCR can detect various unknown microorganisms suggestive of the etiology of CPPS, particularly those that are difficult to cultivate. PCR is expected to play an important role in the diagnosis of CPPS, but further studies will be required to define the usefulness of molecular tests.

Predictive Factors of Advancement of the Pathologic T Stage after Radical Cystectomy in Patients with Clinical T2 Stage Bladder Transitional Cell Carcinoma / 대한비뇨기과학회지

PURPOSE: We wanted to identify the predictive factors of pathologic over- staging in a homogeneous series of patients who had undergone radical cystectomy for their clinical T2 stage bladder cancer. MATERIALS AND METHODS: We retrospectively analyzed the clinicopathological parameter of 53 patients who had undergone radical cystectomy for the management of muscle-invasive transitional cell carcinoma. Of these 53 patients, 44 were men and 9 were women. The mean age was 61.3 years. After dividing the entire cohort into 2 groups according to final pathologic stage (> or = pT3 and or = pT3 and or = 2 months between the diagnosis of muscle invasion and cystectomy had a significantly higher frequency of extravesical disease. CONCLUSIONS: These results underline the need for early treatment with cystectomy, within a 2 month period, once the diagnosis of muscle invasion has been made.

Predicting the Composition of Urinary Stone by Non-enhanced Spiral Computed Tomography / 대한비뇨기과학회지

PURPOSE: We attempted to develop a more accurate set of tools for predicting the composition of urinary stone with using Hounsfield units (HUs) in non-enhanced spiral computed tomography (NESCT). MATERIALS AND METHODS: We evaluated 141 stones, and each of which was determined to contain the predominant stone component more than 70% (84 calcium oxalate, 35 uric acid, 16 carbonate apatite, 4 cystine and 2 brushite). NESCT was conducted at different collimations that varied between 3.75mm, 5mm and 7mm through the stones. One region of interest (ROI) was acquired for the plane that passed through the widest transverse diameter of the stone at the bone window setting. The mean size of the ROI in which the highest attenuation area was located was determined to be 2.0+/-0.5mm2, and we recorded the mean and maximum HU values. In order to assess the partial volume effects, we used the S/C ratio (stone size/collimation ratio). RESULTS: As the S/C ratio increased, both mean and maximum HU values increased, as did the ability to differentiate between different stone compositions. Also, under conditions in which the S/C ratio exceeded 2, we proved to be able to differentiate uric acid stones from other stones, with no overlap in attenuation. Maximum HU values also proved to be effective tools for determining stone composition, as compared with the mean HU values. CONCLUSIONS: In situations in which the S/C ratio exceeded 2, CT HUs proved to be a useful and accurate measurement for predicting uric acid stones.

Guideline for the Surgical Diagnosis and Treatment of Nonpalpable Testis Based on Experiences with Laparoscopic Procedure / 대한비뇨기과학회지

PURPOSE: We assessed our laparoscopic experiences for the children with nonpalpable testis to evaluated the advantages of performing laparoscopy and we suggest a surgical management guideline for them. MATERIALS AND METHODS: We retrospectively reviewed the medical records of a total of 83 children (97 testes) who underwent diagnostic laparoscopy for nonpalpable testes. We analyzed the surgical decisions and outcomes according to the laparoscopic findings. RESULTS: On the laparoscopic examination, 48 (49.5%) testes were located in the abdominal cavity. We subsequently performed inguinal orchiopexy (28), laparoscopic orchiopexy (8), Fowler-Stephens orchiopexy (10, one or two stage), or orchiectomy (2). The other 40 (41.2%) were suspected to be testicular nubbin, and we managed this by excision of the testicular nubbin by the inguinal (29) or scrotal (10) approach, except for one viable testis in the inguinal canal. When blind-ending vessels were observed, we stopped the procedure under the diagnosis of vanishing testis in 9 cases (9.3%). The testicular survival rates were 92.6% (25/27) for inguinal orchiopexy, 100% (8/8) for laparoscopic orchiopexy and 60% (6/10) for Fowler-Stephen orchiopexy. CONCLUSIONS: We preferred laparoscopic orchiopexy for treating intraabdominal testis when the location was > or=2.5cm from the internal ring. When the testicular location was closer to the internal ring, we recommend inguinal orchiopexy as a viable option. In cases with high riding testis or very short internal spermatic vessels, we recommend Fowler-Stephens orchiopexy. For the suspected testicular nubbin, we preferred trans-scrotal excision when the nubbin was identified in the scrotum. Otherwise, we recommend inguinal exploration.

A Prospective Trial Comparing Tension-Free Vaginal Tape and Transobturator Vaginal Tape Inside-Out for the Surgical Treatment of Female Stress Urinary Incontinence: One-Year Follow up

PURPOSE: To compare prospectively and randomly tension-free vaginal tape(TVT) with transobturator vaginal tape inside-out(TVT-O) for the surgical treatment of female stress urinary incontinence(SUI). MATERIALS AND METHODS: One hundred twenty women with SUI were alternately assigned to either the TVT group(n=60) or TVT-O group(n=60). The preoperative evaluation included urodynamic study and a Korean version of the incontinence quality of life questionnaire(I-QoL). At 1-year after operation, surgical outcome, patient I-QoL parameters, long-term complications and uroflowmetry were evaluated in 2 groups. RESULTS: Preoperative patient characteristics including I-QoL and urodynamic study were comparable in the two groups. The rates of cure(86.8% for TVT vs. 86.8% for TVT-O), improvement(6.6% for TVT vs. 8.2% for TVT-O), and failure (6.6% for TVT vs. 5.0% for TVT-O) were similar for the two groups. The I-QoL parameters one year after surgery were improved significantly in both groups(p0.05). The rates of the patient satisfaction with the procedure were 93.4% in the TVT group versus 95.0% in the TVT-O group(p>0.05). Mean operation time(11.5+/-1.4 min versus 15.2+/-1.8 min, p<0.05) was significantly shorter in the TVT-O than TVT. There were no long-term complications, such as vaginal erosion and prolonged voiding difficulty, in either group. CONCLUSION: TVT-O appears to be equally effective as TVT for the surgical treatment of stress urinary incontinence in women at a 1-year follow-up.

The Long-term Efficacy of Laparoscopic Burch Operation for Female Stress Urinary Incontinence / 대한비뇨기과학회지

PURPOSE: To evaluate the long-term efficacy of laparoscopic Burch colposuspension, we reviewed the success rate and subjective satisfaction rate of this operation for female patients with stress incontinence. Materials and Methods: Between Sep. 1995 and Aug. 1999, 126 patients underwent laparoscopic Burch colposuspension. We reviewed 88 patients who had been followed up for more than 3 years. The mean patient age was 51.1 years and 26 of the 88 patients complained of urge incontinence. All were preoperatively assessed with voiding cystourethrography (VCUG), urodynamic study, cystoscopy and stress, emptying, anatomic, protection, and instability (SEAPI) score. Colposuspension was performed with 2 non- absorbable sutures (n=70) or polyprophylene mesh and Tacker (n=18) by the retroperitoneal approach. RESULTS: At the mean follow-up of 56 months, 58 patients (66%) were cured, and 19 patients (22%) showed significant improvements. Sixty one (94.4%) out of 66 patients who had previously required pad protection attained a pad-free status. Urge incontinence disappeared in 15 out of 26 patients, but 8 (9.1%) patients complained of de novo urge incontinence. The pre- operative factors (age, symptom periods, symptom score, abdominal leak point pressure (ALPP) and VCUG findings) made no difference for the success rate. The subjective satisfaction rate was 93%. The mean operation time was 88 minutes and it decreased to 67 minutes after 50 cases. The mean hospital stay was 3.5 days and mean duration of catheterization was 3.7 days. We had 5 (5.68%) cases of complications: two port site bleeding, one peritoneal injury, one respiratory acidosis and one obturator venous bleeding. However, all of them eventually recovered. CONCLUSIONS: Laparoscopic colposuspension revealed good results on the long-term follow-up, as well the operation as being a minimally invasive procedure. There was a 88% success rate, a 93% subjective satisfaction rate and 94% of the patients became pad free.

The Long-term Efficacy of Laparoscopic Burch Operation for Female Stress Urinary Incontinence / 대한비뇨기과학회지

PURPOSE: To evaluate the long-term efficacy of laparoscopic Burch colposuspension, we reviewed the success rate and subjective satisfaction rate of this operation for female patients with stress incontinence. Materials and Methods: Between Sep. 1995 and Aug. 1999, 126 patients underwent laparoscopic Burch colposuspension. We reviewed 88 patients who had been followed up for more than 3 years. The mean patient age was 51.1 years and 26 of the 88 patients complained of urge incontinence. All were preoperatively assessed with voiding cystourethrography (VCUG), urodynamic study, cystoscopy and stress, emptying, anatomic, protection, and instability (SEAPI) score. Colposuspension was performed with 2 non- absorbable sutures (n=70) or polyprophylene mesh and Tacker (n=18) by the retroperitoneal approach. RESULTS: At the mean follow-up of 56 months, 58 patients (66%) were cured, and 19 patients (22%) showed significant improvements. Sixty one (94.4%) out of 66 patients who had previously required pad protection attained a pad-free status. Urge incontinence disappeared in 15 out of 26 patients, but 8 (9.1%) patients complained of de novo urge incontinence. The pre- operative factors (age, symptom periods, symptom score, abdominal leak point pressure (ALPP) and VCUG findings) made no difference for the success rate. The subjective satisfaction rate was 93%. The mean operation time was 88 minutes and it decreased to 67 minutes after 50 cases. The mean hospital stay was 3.5 days and mean duration of catheterization was 3.7 days. We had 5 (5.68%) cases of complications: two port site bleeding, one peritoneal injury, one respiratory acidosis and one obturator venous bleeding. However, all of them eventually recovered. CONCLUSIONS: Laparoscopic colposuspension revealed good results on the long-term follow-up, as well the operation as being a minimally invasive procedure. There was a 88% success rate, a 93% subjective satisfaction rate and 94% of the patients became pad free.