Positive Margin Rate Research Articles

OGC SO33 - Resection Margins in Gastrectomy Patients – Are Current Guidelines Fit for Purpose? An Observational Study from a Tertiary Centre

Abstract Background Positive resection margins in cancer surgery are associated with higher likelihood of locoregional recurrence and poor outcomes. The Association of Upper GI Surgeons (AUGIS) outlined a target of less than 5% margin positivity for gastric resections, a goal not met in repeated national audits (NOGCA). Our study aimed to evaluate the positive resection margin rate after a gastrectomy in a tertiary centre and identify associated factors to assess the current guideline's suitability. Our hypothesis is that positive longitudinal margins are more related to tumour factors, such as proximity to the intended margin, rather than poor surgical technique. Method All records of patients who underwent gastrectomy from June 2015 to September 2021 were retrospectively reviewed. Data collection included demographic details, type of gastrectomy, exposure to neoadjuvant chemotherapy, and post operative histopathological information such as tumour differentiation, presence of signet ring (SR) morphology and linitis-plastica (LP), and resection margin(RM) status. Chi square tests of association were utilised to determine associations between the resection margin status and the potential determinant factors. Results Our study included 144 subjects (100 males, mean age 66, range 27-87). Types of gastrectomy were subtotal (38.9%), proximal (4.2%), total (29.2%), extended total (ETG) (27.8%). Positive RMs were found in 13.2%, with 8.3% having positive longitudinal margins and 6.3% positive circumferential margins. Neoadjuvant-chemotherapy was completed by 73% of subjects. Poor tumour differentiation was seen in 59.7%, SR presence in 12.5%, and LP in 3.5%. Significant associations were noted between positive margins and LP (80%, p<0.001) and age (<65: 15%, >=65: 4%, p=0.028). ETGs had double the rate of positive margins (12.5%) than that of other gastrectomies (6.7%,p=0.314). Conclusion The overall positive longitudinal margin rate was higher than the national guideline, replicating NOGCA audits. Our hypothesis was not proved: although the longitudinal positive margin rate in ETGs was almost double that of other gastrectomies, this did not reach statistical significance. Positive margin rates were higher in younger patients, and those with LP. Further large-scale audit is urgently required to determine if the recommended margin rate is appropriate or whether it should be adjusted for factors such as tumour location, presence of LP and age when the risk of a positive margin is higher.

HPB SO24 - Recurrence Pattern of Pancreatic Ductal Adenocarcinoma based on Time-to-Recurrence: A 5-year Single-Centre Retrospective Study

Abstract Background A vast majority of patients with pancreatic ductal adenocarcinoma (PDAC) develop early disease recurrence, even after curative-intent surgical resection. Understanding the pattern of disease recurrence will enable identification of areas for improvement within the preoperative diagnostic and management algorithms for these patients. The aim of the retrospective cohort study was to compare the recurrence pattern of PDAC in patients with early (<12 vs >12 months) and very early (<6 vs >6 months) recurrence following surgical resection. Method A retrospective review of histologically confirmed pancreatic ductal adenocarcinoma patients who underwent pancreaticoduodenectomy (N=151) between 2015-2020 at a tertiary HPB centre was undertaken. All patients underwent CT and PET-CT for initial staging before resection. Initial recurrence after resection was identified through postoperative imaging and/or HPB MDT outcomes. Early recurrence (ER) was defined as recurrence within the first 12 months after surgery (n=78). Additionally, very early recurrence (VEM) was defined as recurrence within the first six months after surgery (n=46). Statistical analysis was performed using GraphPad Prism 8.0. Results In total, 117 (77.5%) of patients experienced recurrence, with a median recurrence-free survival of 11.3 (5.1-19.6) months. Patients with ER had significantly higher pathological T staging (p=0.01), greater margin positivity rate (p=0.01) and higher lymph node ratio (p=0.046), while those in VER had significantly larger maximum tumour diameter and number of involved lymph nodes (p=0.04) compared to their counterparts. Patients with ER (47.4 vs 31.5%, p=0.046) and VER (60.9 vs 30.5%, p<0.001) had significantly greater rates of liver metastasis compared to their counterparts. There were no differences in loco-regional recurrence, peritoneal or pulmonary metastasis between the groups. Conclusion Approximately 20% of patients undergoing surgical resection for PDAC developed liver metastasis within six months of surgery. This raises concerns for the presence of micro-metastatic disease within the liver unidentified on preoperative imaging. Therefore, there is a need to enhance preoperative imaging and treatment algorithms to improve survival of patients with PDAC.

The Evolving Role of Neoadjuvant Radiation Therapy in Pancreatic Adenocarcinoma

Background/Objectives: Pancreatic ductal adenocarcinoma (PDAC) is one of the deadliest cancers. Surgical resection is the most reliable chance for cure, but high rates of positive margins and local failure persist. Neoadjuvant therapies (NAT), including chemotherapy and radiation therapy (RT), are being explored to improve surgical outcomes, particularly in borderline resectable (BRPC) and locally advanced pancreatic cancer (LAPC). This review aims to summarize the current landscape and future directions for neoadjuvant RT (NART) in PDAC. Methods: The review includes a detailed analysis of past and ongoing clinical trials investigating various NART approaches in PDAC, with an emphasis on different RT techniques, fractionation schemes, and their integration into multimodal treatment strategies. Results: Early evidence suggests that NART can improve resection margins and local control. However, recent trials, including the Alliance A021501 and LAP-07 trials, have failed to demonstrate significant survival benefits with the addition of RT to NAT. Nevertheless, nuances in trial design and execution continue to keep the question of NART open. Newer approaches, such as stereotactic magnetic resonance-guided adaptive radiation therapy (SMART), show promise in improving local control and survival, but further phase 3 trials are needed. Conclusions: While NART has shown potential in improving local control in PDAC, its impact on overall survival remains unclear. Ongoing trials, particularly those utilizing advanced techniques like SMART, are critical in defining the role of RT in the neoadjuvant setting for PDAC. Collaboration across multidisciplinary teams is essential to optimize treatment strategies and trial outcomes.

Biochemical recurrence after open radical prostatectomy in a single-center cohort with a minimum follow-up of 10 years

Purpose: To investigate the long-term oncological outcomes and report biochemical recurrence (BCR)-free survival for men who underwent open radical prostatectomy at a single center. Materials and methods: A total of 360 patients who underwent open radical prostatectomy at our institution between 2003 and 2011 were included in this study. The BCR-free survival rates were calculated by Kaplan-Meier method and log-rank analysis. Multivariable Cox regression models were used to test the effect of other factors such as age, preoperative prostate-specific antigen (PSA), Gleason score, and surgical margins on BCR. Results: Median patient age was 65.4 years, with a median preoperative PSA level of 6.21 ng/ml. Operating time had a median duration of 155.1 minutes, ranging from 104 to 301 minutes. Nerve-sparing surgery was achievable in 48.1% of patients, including 34.2% undergoing bilateral procedures and 13.9% unilateral. In terms of surgical precision and outcomes, the overall rate of positive surgical margins was 23.6%, which decreased significantly to 11.1% in patients with localized prostate cancer. Lymph node involvement occurred in 3.6% of cases. Postoperative care statistics revealed a median catheterization duration of 9.1 days (range: 4–30 days) and a low rate of significant complications (4.4%). The early continence rate in a standardized pad test was 80.6%. At a median follow-up of 150.5 months, the 5-year and 10-year BCR-free survival rates for the entire cohort were 91.4% and 77.5%, respectively. The 10-year BCR-free survival rates were 84.8%, 81.5%, and 68.5% for low-, intermediate-, and high-risk patients, respectively. Furthermore, the 10-year BCR-free survival rates were 78.8% and 62.8% for localized and locally advanced prostate cancer, respectively. Preoperative PSA >20 ng/ml, postoperative Gleason sum ≥3 + 4, and positive surgical margins were associated with increased risk of BCR on multivariable Cox regression analysis. Conclusion: Our long-term oncological results match or exceed those previously published in similar contemporary cohorts with long follow-up.

Outcomes after robot-assisted radical cystectomy with orthotopic neobladder in women

PurposeTo investigate functional, oncological and complication outcomes in women undergoing robot-assisted cystectomy (RARC) with intracorporeal orthotopic neobladder.MethodsFrom a multi-institutional database, we identified females with bladder cancer treated with RARC and intracorporeal orthotopic neobladder. We evaluated the continence rate, short-term oncological outcomes, and complication rates. Analyses were repeated and stratified by the status of preserving gynecological organs.ResultsThe study involved 146 patients with the median age 60 years (IQR, 51–66 years). Pelvic organ-preserving procedure (POP) was performed in 77 patients (53%). Overall daytime and nighttime continence rates were 54% and 53%, respectively. For POP, the continence rate was 58% for both daytime and nighttime continence. In the non-POP cohort, the continence rate was 50% for daytime and 49% for nighttime continence. Both groups had balanced positive surgical margin rates (5,3% for POP and 4,7% for non-POP). In the whole cohort, high-grade (Clavien-Dindo ≥3) early and late complication rate was 7,5% and 7,5%, respectively.ConclusionsRobot-assisted radical cystectomy with intracorporeal orthotopic neobladder in females demonstrate excellent functional and complication outcomes. Pelvic organ-preserving cystectomy enhances urinary continence rates without adversely affecting surgical margins. Orthotopic neobladder in selected women with bladder cancer, along with pelvic organ-preserving cystectomy may be used for improved functional outcomes without compromising oncological results.

Racial Disparities in Preoperative Breast MRI Use and Surgical Margin Outcomes among Patients with Recently Diagnosed Breast Cancer.

Purpose To evaluate racial disparities in preoperative breast MRI use and surgical margin outcomes among patients with recently diagnosed breast cancer. Materials and Methods This retrospective study included patients with breast cancer who presented to a single cancer center between 2008 and 2020, underwent breast surgery, and self-identified as White or Black. Patients were divided into MRI or no-MRI cohorts based on preoperative MRI use. MRI use and positive surgical margin rates were determined for all patients and racial subgroups. Data were collected from the electronic medical record and analyzed using the χ2 test for significance. Results The study included 28 384 female patients (mean age, 56 years ± 13 [SD]) with recently diagnosed breast cancer who self-identified as White (90.36%, n = 25 647) or Black (9.64%, n = 2737). Of the entire cohort, 32.78% (9305 of 28 384) underwent preoperative MRI. Black patients had a lower rate of preoperative MRI use than White patients (29.85% [817 of 2737] vs 33.10% [8488 of 25 647], respectively; P < .001). The MRI cohort had a lower positive margin rate compared with the no-MRI cohort (2.90% [133 of 4592] vs 4.78% [539 of 11 271], respectively; P = .03). In the no-MRI cohort, Black patients had a higher positive margin rate than White patients (6.17% [68 of 1103] vs 4.63% [471 of 10 168], respectively; P = .03). In the MRI cohort, there was no evidence of a difference in positive margin rates between Black and White patients (3.17% [12 of 379] vs 2.87% [121 of 4213], respectively; P = .90). Conclusion Compared with White patients, Black patients with breast cancer were less likely to undergo preoperative MRI and had a higher positive surgical margin rate. Keywords: MR Imaging, Breast Cancer, Breast MRI © RSNA, 2024 See also the commentary by Tran and Miles in this issue.

Case Volume Is Not Associated With Outcomes After Adrenalectomy Performed by Urologic Surgeons.

Our goal was to compare outcomes of adrenalectomy performed by low-volume and high-volume academic urologists with extensive experience in renal surgery. A single-center retrospective review identified patients undergoing adrenalectomy by urologists from 2009 to 2023. Data were gathered on demographics, tumor characteristics, surgeon volume, surgical outcomes including length of procedure, estimated blood loss, length of stay, and complications identified by the Clavien-Dindo complication classification system. Bivariable and multivariable analyses adjusting for BMI, size of mass, age, and surgical approach compared outcomes between low- and high-volume adrenalectomy surgeons. A total of 304 adrenalectomies were performed by 7 urologic surgeons during the study period. One surgeon was high volume, with an average of 15 adrenalectomies per year during the study period. The remaining 6 surgeons ranged from < 1 to 4 adrenalectomies per year on average during the study period and were considered low volume. On multivariable analysis, the rate of any complication was found to be significantly different between the groups (5.3% vs 13.5%, P = .01). However, on analysis of Clavien 3 or higher complications, the rate was not found to be different (1% vs 4%, P = .22). Procedure time (130 vs 134 minutes, P = .33), estimated blood loss (30 vs 50 mL, P = .86), positive margin rate (11% vs 7%, P = .35), and length of stay (2 days vs 2 days, P = .22) were not different when the surgery was performed by a high-volume or low-volume urologist. Surgical volume may not affect outcomes of adrenalectomy when performed by urologists experienced in retroperitoneal surgery at a high-volume, specialized center.

Robotic surgery of the urothelial carcinoma of the upper urinary tract single surgeon initial experience, 66 consecutive cases

PurposeRobotic surgery is increasingly utilized in the treatment of urothelial carcinoma of the upper urinary tract (UTUC). This study investigates the advantages and burden of robot-assisted surgical treatment of the urothelial carcinoma of the upper urinary tract in a referral urological department, along with their functional and oncological results.MethodsThe study included 66 prospectively enrolled patients who were surgically treated by a single, robotically specialized surgeon between July 2019 and December 2023. Patients were divided into three groups. Group 1: 50 patients underwent robot-assisted radical Nephroureterectomy (RANU) with bladder cuff excision, Group 2: 11 patients underwent RANU simultaneously with robot-assisted radical cystectomy (RARC), and Group 3: 5 patients underwent robot-assisted segmental ureterectomy (RASU). Clinical and oncological parameters were compared. Perioperative morbidity according to Clavien-Dindo was the primary endpoint of our study. The secondary endpoint was oncologic outcomes.Results37.8% of patients had locally advanced carcinomas. The average console time of RANU with bladder cuff excision was 69 min. The rate of positive surgical margins was n = 1/66 (2%). Lymphadenectomy (LAD) was performed on 30% of patients, with a mean of 13.7 lymph nodes removed. Of those who received LAD, 33% had lymph node metastasis. n = 6/66 (9%) patients received blood transfusion. The overall complication rate was 24%. The readmission rate was 7.5%. With a median follow-up of 26 months, the 2-year recurrence-free survival rate was 84.4%, and the 2-year overall survival rate was 94%.ConclusionRobotic surgery is a feasible option for treating UTUC that can be adapted to meet the surgical needs of each patient. Prospective studies are warranted to confirm its benefits.

Is It Worth Performing Intersphincteric Resection in Patients Having Rectal Adenocarcinoma with Oligometastasis

AbstractIntersphincteric resection (ISR) is being increasingly performed in metastatic rectal adenocarcinoma (with oligometastasis) patients. There has been a trend towards worse prognosis in this group. This study compares the oncological and surgical outcomes of patients with and without pre-operative oligometastasis who underwent ISR. The outcomes compared include prognostic factors like margin positivity, recurrence rates, stoma reversal rate, and surgical failure rate (defined as a combination of one or more of the aforestated factors). The demographic pattern, American Society of Anaesthesia grade (ASA), treatment received, clinical and histopathological T and N stage, grade, type of minimally invasive surgery (MIS) approach, neoadjuvant therapy, and pathological high-risk features are also studied. Patients who underwent minimally invasive ISR over 10 years at a high-volume tertiary cancer center were selected for the study. Factors used for the assessment of oncological outcomes were margin positivity (circumferential resection and distal margin), recurrence (both local and systemic), and stoma reversal rate. A descriptive and comparative analyses were performed. Four hundred and eight patients underwent minimally invasive ISR of which 25 (6.12%) patients were oligometastatic. While R0 resection was similar in both groups, higher overall recurrence (24% versus 18.5%) and low stoma reversal rate (36.8% versus 67.3%) were observed in the oligometastatic group with statistically significant differences. No local recurrence was seen in the oligometastatic group, and the difference compared to non-metastatic group was not statistically different. This study indicates that oligometastatic patients who underwent ISR experienced lower stoma reversal rates, maintaining similar local control but facing higher rates of systemic recurrence.

Association between maximal urethral length preservation and postoperative continence after robot-assisted radical prostatectomy: a meta-analysis and systematic review.

Urinary incontinence is a common complication following robot-assisted radical prostatectomy (RARP). Urethral length has been identified as a factor affecting postoperative continence recovery. In this meta-analysis, we examined the association between use of the maximal urethral length preservation (MULP) technique and postoperative urinary continence in patients undergoing RARP. We conducted a comprehensive search of PubMed, Web of Science, Embase, and the Cochrane Library up to December 31, 2023. The quality of the literature was assessed using the Newcastle-Ottawa Scale. A random-effects meta-analysis was performed to synthesize data and calculate the odds ratio (OR) from eligible studies on continence and MULP. Six studies involving 1869 patients met the eligibility criteria. MULP was positively associated with both early continence (1 month after RARP; Z = 3.62, P = 0.003, OR = 3.10, 95% confidence interval [CI]: 1.68-5.73) and late continence (12 months after RARP; Z = 2.34, P = 0.019, OR = 2.10, 95% CI: 1.13-3.90). Oncological outcomes indicated that MULP did not increase the overall positive surgical margin rate or the positive surgical margin status at the prostate apex (both P > 0.05). In conclusion, the use of the MULP technique in RARP significantly improved both early and late postoperative continence outcomes without compromising oncological outcomes.

Pathologic Characteristics and Surgical Outcomes of Pediatric Versus Adult Well-Differentiated Thyroid Cancer.

Despite the rising incidence of pediatric differentiated thyroid cancer (DTC), postoperative outcomes for such tumors have not been well-characterized. The objective of this study was to compare pathologic tumor characteristics and treatment outcomes for pediatric and adult patients with DTC. Retrospective case-control study. National database. Pediatric (<18 years old) and adult (≥18 years old) patients who underwent surgery for DTC in the National Cancer Database (2004-2020) were included. Multivariable logistic, negative binomial, and linear regressions were used to compare pathologic tumor characteristics, treatment characteristics, and short-term surgical outcomes. 337,864 patients with DTC met the study eligibility criteria; 3584 (1.1%) were pediatric patients and 334,280 (98.9%) were adults. After adjustment, pediatric patients were found to have higher rates of pathologic T upstaging (adjusted odds ratio [ORadj]: 1.40, 95% confidence interval [CI]: 1.23-1.59), N upstaging (ORadj: 2.53, 95% CI: 2.23-2.88), and extrathyroidal extension (ORadj: 1.58, 95% CI: 1.29-1.94), compared to adult patients. Pediatric patients were also more likely to receive neck dissection (ORadj: 2.80, 95% CI: 2.55-3.07) and radioactive iodine (ORadj: 1.42, 95% CI: 1.30-1.55). Pediatric patients had higher rates of positive surgical margins (ORadj: 1.25, 95% CI: 1.11-1.41) and 30-day readmissions (ORadj: 1.26, 95% CI: 1.00-1.58) than adult patients. These findings demonstrate that pediatric DTC is associated with more aggressive disease presentations, more radical treatment, and worse short-term surgical outcomes compared to DTC in adults. Pediatric DTC should be considered a unique clinical entity that requires personalized evaluation and multidisciplinary treatment by specialized providers.

Early oncological outcomes of delayed radical prostatectomy: A prospective, international, follow‐up analysis of the COVIDSurg‐Cancer study

AbstractObjectivesThe objective of this study is to compare the early oncological outcomes of delayed (&gt;90 days) versus scheduled (≤90 days) radical prostatectomy (RP).Patients and methodsPatients with prostate cancer due to undergo surgery between March 2020 and June 2020 who were enrolled in the COVIDSurg‐Cancer international, observational study were prospectively followed up for 1 year. Time to surgery was defined as the difference between the operation date and the multi‐disciplinary team decision to offer surgery. The primary outcome was the positive surgical margin (PSM) rate. Biochemical recurrence (BCR), upgradation and upstaging were secondary oncological outcomes. The Independent t‐test and Mann Whitney U test were used to compare means between groups and regression models and were used to investigate factors associated with the primary outcome.ResultsFour hundred seventy‐six (78.7%) patients underwent RP from 605 that were eligible. Three hundred seven (64.5%) patients underwent scheduled RP, and 169 (35.5%) underwent delayed RP. A small proportion of men (n = 35, 6.8%) did not undergo RP within the 1‐year follow‐up period. More men with high‐risk disease (72.8%) underwent scheduled RP compared to men with intermediate‐risk disease (60.2%) (p &lt; 0.05). There was no statistically significant difference in the PSM rate between the two groups (p = 0.512). Delay in surgery was not associated with an increased PSM or BCR on univariable or multivariable analyses. There was statistically significantly greater upstaging (p &lt; 0.05) in the delayed group but no difference in upgradation.ConclusionHigh‐risk men were prioritised for surgery during the COVID‐19 pandemic. Our prospective data support previous retrospective, cancer‐registry evidence suggesting no adverse oncological impact after delaying RP across all risk groups. Our study is limited by the short follow‐up period, and therefore, longer term conclusions cannot be drawn.

Postoperative pathological findings and prognosis of early laryngeal and pharyngeal cancer treated with transoral surgery

ObjectiveTransoral surgery for early-stage pharyngeal and laryngeal cancer provides good local control and is less invasive than external incisions. Postoperative pathological findings are considered the most important indicators for determining postoperative treatment, but detailed criteria have not been established. In this study, we evaluated the impact of postoperative pathological findings on prognosis of patients undergoing transoral surgery. MethodsThis study included patients with oropharyngeal, hypopharyngeal, and supraglottic cancer who underwent transoral surgery at Gifu University Hospital from April 2016 to December 2023. Resection margins were pathologically evaluated with horizontal and vertical margins, and vascular invasion was evaluated in three categories: lymphatic invasion, venous invasion, and perineural invasion. The correlation between each postoperative pathological finding and prognosis was evaluated. ResultsA total of 70 cases were assessed in this study. Cases of horizontal margin positive were 38.6 %, and cases of vertical margin positive were 27.1 %. Prognoses were comparable to previous reports. Despite the high margin positive rate, the 5-year overall survival rate was 77.1 %. The 5-year disease-specific survival rate was 89.7 %, and the 5-year local control rate was 85.3 %. Notably, when evaluated by margin direction, cases with positive horizontal margins had significantly worse prognoses. Although no significant correlation was found between vascular invasion and prognosis, cases of venous invasion tended to have a higher local recurrence rate. ConclusionThis study suggests that transoral surgery has good prognosis despite a high positive-margin rate. However, detailed criteria for additional treatment have not been developed, and further case accumulation is required. Intriguingly, positive horizontal margins are correlated with significantly worse prognosis. This result may be related to a high risk of multiple cancers, and careful follow-up after surgery is recommended.

The Controlling Nutritional Status (CONUT) Score as a Predictor of Local Recurrence in Patients Underwent Partial Nephrectomy Alongside the R.E.N.A.L. Nephrometry Score.

This study aims to assess the utility of the CONUT (Controlling Nutritional Status) Score and R.E.N.A.L. (Renal Nephrometry Score) Score in predicting tumor recurrence in patients with kidney cancer. Additionally, we investigated which parameters contributed to these scores. In total, 115 patients who underwent partial nephrectomy between January 2015 and August 2023 at a single tertiary center were enrolled. After the exclusion criteria, data from 88 patients were analyzed. Age, gender, body mass index (BMI), comorbidities (hypertension, diabetes), smoking status, tumor characteristics, CONUT Scores, and R.E.N.A.L. scores were retrospectively recorded. Statistical analyses were performed, and significant p was p < 0.05. The presence of diabetes and hypertension showed a statistically significant association with tumor recurrence (p = 0.033 and p = 0.003, respectively). A high BMI significantly increased the risk of recurrence (p < 0.05). There was a strong positive relationship between the high tumor stage and positive surgical margins with recurrence (p < 0.001). Patients with high R.E.N.A.L. Scores and high CONUT Scores had a higher risk of recurrence (42.1% and 8.7%, respectively), and this difference was statistically significant (p < 0.001). CONUT and R.E.N.A.L. scores may be used to predict tumor recurrence after partial nephrectomy. Additionally, diabetes, hypertension, high BMI, and positive surgical margin rate might affect surgical success rate for recurrences. Clinicians should consider all these parameters and coring systems to gather more successful results after partial nephrectomy.

Transperineal minimally invasive surgery during laparoscopic abdominoperineal resection for low rectal cancer could improve short-term outcomes: A single-institution retrospective cohort study.

Transperineal minimally invasive surgery (TpMIS) during laparoscopic abdominoperineal resection (APR) is an emerging approach that allows for the precise treatment of lower rectal cancer. However, evidence regarding the efficacy of TpMIS is insufficient. This study evaluated the efficacy of TpMIS during laparoscopic APR for patients with lower rectal cancer. Patients who underwent laparoscopic APR with TpMIS (TpMIS group; n = 12) and those who underwent conventional laparoscopic APR for low rectal cancer (conventional group; n = 13) were enrolled consecutively in this retrospective study. Standardized TpMIS was performed at our institution. Patient and tumor characteristics and intraoperative, postoperative, and pathological outcomes were compared between groups. The primary outcome was postoperative perineal wound infection. No patients in the TpMIS group experienced postoperative perineal wound infection; however, five (38.5%) patients in the conventional group experienced postoperative perineal wound infection (significant difference; p = 0.016). The estimated blood loss (median, 81mL vs. 463mL) and incidence of postoperative urinary dysfunction (8.3% vs. 46.1%) were significantly lower in the TpMIS group than in the conventional group. The postoperative hospital stay (median, 13 vs. 20days) of the TpMIS group was significantly shorter than that of the conventional group. Pathological outcomes did not differ between groups. The positive circumferential resection margin rates of the TpMIS and conventional groups were 8.3% and 15.4%, respectively. TpMIS during laparoscopic APR was associated with significant improvements in the postoperative outcomes of patients with low rectal cancer.

The impact of surgical technique on very early functional outcomes after radical prostatectomy.

To determine the very early functional as well as oncological outcomes after robot-assisted radical prostatectomy (RARP) and open radical prostatectomy (ORP) at a single institution. We identified patients who underwent RARP or ORP at our institution between August 2021 and July 2023. The main criterion for surgical technique selection was patient preference. Primary endpoints included anastomosis leakage rate, very early continence rate reported by standardized pad-test, and positive surgical margin rate. Furthermore, we analyzed operation time, hospital stay, postoperative analgesia, and complication rates. In this prospective study, we analyzed data from 222 radical prostatectomies (111 RARP and 111 ORP). There were no significant differences in preoperative age, prostate size, and risk stratification among the groups. Patients who underwent RARP had lower anastomosis leakage rates (8.1% vs. 18.9%) and slightly lower early continence rates (76.6% vs. 78.4%) when compared to patients who underwent ORP. Positive surgical margin rates were similar, and complication rates were also comparable. Operation time was similar for both techniques, but the hospital stay was significantly shorter in the RARP group (6.3 vs. 9.1 days, p=0.03). The ORP group experienced significantly higher opioid administration postoperatively (p<0.001). From a functional and oncological point of view, both techniques are safe and provide excellent outcomes when performed by experienced surgeons. Nevertheless, patients are likely to benefit from a shortened hospital stay and reduced postoperative pain after RARP.

Detection of Apical Cancer with Novel Imaging Modalities to Predict Apical Margin Positivity in Robotic Assisted Radical Prostatectomy

ObjectivesTo evaluate margin positivity at apex utilizing preoperative magnetic resonance imaging [MRI], micro-ultrasound [MUS], prostate specific membrane antigen positron emission tomography PSMA PET] scan, biopsy location and intraoperative timing of deep venous complex [DVC] ligation during robot assisted radical prostatectomy [RARP]. MethodsInstitution review board approved retrospective study underwent RARP between November 2022 to March 2024. All patients underwent preoperative MRI, MUS and PSMA PET scan. Patients underwent RARP using either standard DVC [done prior apical dissection] ligation or delayed DVC [after prostate removal] technique. All patients underwent intra operative frozen section analysis by an experienced genitourinary pathologist. Descriptive statistics were performed. Data analyzed using R software version 4.3.3. ResultsTotal 619 prostate cancer patients underwent RARP. Of these, 365 men underwent RARP using delayed DVC ligation technique and 254 men using standard DVC ligation technique. There was no statically significant difference in two groups on demographic parameters, MRI, MUS and PSMA-PET scan features. Sensitivity of MRI, MUS, PSMA-PET and prostate biopsy for detection of apical positive margin were 66%, 81%, 81% and 73% respectively. Specificity of MRI, MUS, PSMA-PET and prostate biopsy for detection of apical positive margin were 45%, 14%, 16% and 30% respectively. When all modalities are used accumulatively, apical cancer was missed only in 1% of cases. ConclusionsWith proper preoperative understanding of apical lesion location, timing of DVC ligation [standard vs delayed] doesn't impact apical positive surgical margins. Combination of MRI, MUS, PSMA-PET and prostate biopsy reduce apical positive surgical margin rates significantly.

Effects of modifying hinotori™ surgical robot system on perioperative outcome of robot-assisted radical prostatectomy.

One of the main advantages of the hinotori™ surgical robot system (HSRS) is that it can be easily adjusted. This study aimed to clarify the effects of modifying the HSRS on the perioperative outcomes of robotic-assisted radical prostatectomy (RARP). Overall, 158 cases of RARP using the HSRS were classified into three groups based on the modification to the system: group A (no modification, 70 cases), group B (addition of the ability to switch between two types of scopes and to adjust the arm base tilt back and forth, left and right, 42 cases), and group C (reduction of arm floating sensation, mitigation of emergency stop during arm collision, and addition of clutch function via hand switch in addition to foot pedal, 46 cases). The perioperative outcomes of each group were compared. The median of operation time, cockpit time, and cockpit time excluding the time required for lymph node dissection of group C were 223, 146, and 135 min, respectively, where are significantly shorter than those of group A (308, 228, and 208 min, p < 0.0001, respectively) and group B (319, 241, and 214 min, p < 0.0001, respectively). There was no significant difference in the rate of positive margin rates and the pad-free rate before the first follow-up visit among these three groups. The complication rates in groups A, B, and C were 11.4%, 9.4%, and 8.4% (Clavien-Dindo grades I-II), and 4.3%, 2.4%, and 0% (grade III), respectively. The modifications to the HSRS have enabled smoother surgical procedures for RARP.

Impact of oral antithrombotic agents on urinary continence recovery following robot-assisted radical prostatectomy: a retrospective cohort study

BackgroundRobot-assisted radical prostatectomy (RARP) is a preferred minimally invasive surgical treatment for prostate cancer. The number of elderly patients and those with cardiovascular and/or cerebrovascular issues undergoing surgery is increasing, and many of them are taking antithrombotic (AT) agents. However, the effect of AT agents on postoperative urinary recovery has not been adequately studied. In this study, we analyzed the differences in the postoperative recovery of urinary continence and oncological outcomes in patients undergoing RARP for localized prostate cancer between AT agent adherents and non-adherents.MethodsA total of 394 patients who underwent conventional anterior RARP between February 2015 and February 2021 were categorized into two groups: those taking oral AT agents (AT group) and the control group. Urinary continence recovery, complications, and oncological outcomes were compared between the groups. A Cox proportional hazards analysis was performed to identify clinical factors that affect urinary continence recovery.ResultsThe background data and bleeding complications did not differ significantly between the groups. The recovery of continence was significantly poorer in the AT group in terms of complete pad free (HR: 0.53 [95% CI: 0.39–0.71]) and use of ≤ 1 safety pad (HR: 0.74 [95% CI: 0.59–0.94]). The rate of anastomotic leakage on cystography was significantly higher in the AT group (20.9% vs. 6.7%). A univariate analysis revealed that taking antithrombotic agents, higher prostate-specific antigen levels, and a more advanced clinical stage were associated with a poor urinary continence recovery; a multivariate analysis showed that taking AT agents was an independent factor negatively associated with urinary continence recovery. There was no significant difference between the groups in the positive surgical margin rate (19.0% vs. 23.8%) or the biochemical-recurrence-free rate.ConclusionTaking oral AT agents may be associated with poor urinary continence recovery after RARP.

Effect of Precise Dissection and Reconstruction of the Prostate Apex and Bladder Neck in Radical Prostatectomy on Urinary Control Improvement

To investigate the impact of the precise dissection and reconstruction of the prostate apex and bladder neck urethra during radical prostatectomy on the improvement in postoperative urinary control in patients with prostate cancer. A retrospective study was conducted. A total of 131 prostate cancer patients who underwent robot-assisted radical prostatectomy at our institution between January 1, 2023 and December 31, 2023 were enrolled. The subjects were divided into two groups, with 64 in the experimental group and 67 in the control group. Patients in the experimental group underwent radical prostatectomy in a modified approach, while those in the control group underwent conventional radical prostatectomy. Propensity score matching was employed to match the two groups at a 1-to-1 ratio based on age, body mass index (BMI), preoperative prostate specific antigen (PSA), prostate volume, Prostate Imaging Reporting and Data System (PI-RADS) scores, biopsy Gleason score, and preoperative urinary control status. After matching, we compared the preoperative baseline data, surgical margin positivity rates, and urinary control status at 3 months post operation between the two groups. Urinary control was assessed before and after surgery using the International Consultation on Incontinence Questionnaire-Urinary Incontinence Short Form (ICIQ-UI SF) scale. A total of 56 pairs of patients were successfully matched between the experimental group and the control group through 1-to-1 propensity score matching. At 3 months after surgery, the median score for ICIQ-SF scale of the experimental group was 7.0 points, while that of the control group was 9.5 points, with the difference being statistical significant (P<0.05). There was no significant difference in the positive rate of incision margins between the experimental group and the control group. Multiple linear regression analysis showed that both the prostate volume and the Gleason score in the experimental group were positively correlated with the ICIQ-UI SF scores 3 months after surgery (P<0.05), while the age of patients in the control group was positively correlated with ICIQ-UI SF score 3 months after surgery (P<0.05). Precise dissection and reconstruction of the prostate apex and bladder neck urethra during radical prostatectomy significantly improve the postoperative urinary control of patients at 3 months after surgery.