Bladder Stones in Renal Transplant Patients: Presentation, Management, and Follow-up.

INTRODUCTION: The study aim was to analyze the presentation, management, and follow-up of renal transplant patients developing bladder calculi. METHODS: Patients who underwent renal transplant with postoperative follow-up at our institution were retrospectively analyzed (1984-2023) to assess for the development of posttransplant bladder stones. All bladder stones were identified by computerized tomography imaging and stone size was measured using this imaging modality. RESULTS: The prevalence of bladder calculi post-renal transplantation during the study window was 0.22% (N = 20/8,835) with a median time to bladder stone diagnosis of 13 years posttransplant. Of all bladder stone patients, 6 (30%) received deceased donor and 14 (70%) living donor transplants. There were 11 patients with known bladder stone composition available; the most common being calcium oxalate (N = 6). Eleven (55%) patients had clinical signs or symptoms (most commonly microhematuria). Fourteen of the bladder stone cohort patients (70%) underwent treatment including cystolitholapaxy in 12 subjects. Of these 14 patients, 9 (64%) were found to have nonabsorbable suture used for their ureteroneocystostomy closure. CONCLUSIONS: The prevalence of bladder stones post-renal transplant is low. The utilization of nonabsorbable suture for ureteral implantation was the main risk factor identified in our series. This technique is no longer used at our institution. Other factors contributing to bladder stone formation in this population warrant identification.

A Comprehensive Review of the Current State of Robot-assisted Laparoscopic Salvage Prostatectomy.

BACKGROUND AND OBJECTIVE: Salvage robot assisted radical prostatectomy (sRARP) is performed for patients with biochemical or biopsy proven, localized prostate cancer recurrences after radiation or ablative therapies. Traditionally, sRARP has been avoided by lower volume surgeons due to technical demand and high complication rates. Post-radiation sRARP outcomes studies exist but remain few in number. With increasing use of whole gland and focal ablative therapies, updates on sRARP in this setting are needed. The aim of this narrative review is to provide an overview of recently reviewed studies on the oncologic outcomes, functional outcomes, and complications after post-radiation and post-ablative sRARP. Tips and tricks are provided to guide surgeons who may perform sRARP. MATERIALS AND METHODS: We performed a non-systematic literature search of PubMed and MEDLINE for the most relevant articles pertaining to the outlined topics from 2010-2022 without limitation on study design. Only case reports, editorial comments, letters, and manuscripts in non-English languages were excluded. Key Content and Findings: Salvage robotic radical prostatectomy is performed in cases of biochemical recurrence after radiation or ablative therapies. Oncologic outcomes after sRARP are worse compared to primary surgery (pRARP) though improvements have been made with the robotic approach when compared to open salvage prostatectomy. Higher pre-sRARP PSA levels and more advanced pathologic stage portend worse oncologic outcomes. Patients meeting low-risk, EAU-biochemical recurrence criteria have improved oncologic outcomes compared to those with high-risk BCR. While complication rates in sRARP are higher compared to pRARP, Retzius sparing approaches may reduce complication rates, particularly rectal injuries. In comparison to the traditional open approach, sRARP is associated with a lower rate of bladder neck contracture. In terms of functional outcomes, potency rates after sRARP are poor and continence rates are low, though Retzius sparing approaches demonstrate acceptable recovery of urinary continence by 1 year, post-operatively. CONCLUSIONS: Advances in the robotic platform and improvement in robotic experience have resulted in acceptable complication rates after sRARP. However, oncologic and functional outcomes after sRARP in both the post-radiation and post-ablation settings are worse compared to pRARP. Thus, when engaging in shared decision making with patients regarding the initial management of localized prostate cancer, patients should be educated regarding oncologic and functional outcomes and complications in the case of biochemically recurrent prostate cancer that may require sRARP.

Less is more: single dose versus extended antibiotic prophylaxis for transperineal prostate biopsy.

INTRODUCTION: There is an ongoing debate as to the appropriate regimen of antibiotic prophylaxis with transperineal (TP) biopsy. The objective of this study was to report the rate of infection following TP biopsy at a high-volume institution and assess the impact of single dose antibiotics at the time of biopsy versus outpatient antibiotics in preventing postprocedural infections. MATERIALS AND METHODS: Records of men undergoing TP prostate biopsy from 2012 to 2022 were reviewed. Patients were divided into two groups, those who received single dose intravenous (IV) antibiotics at the time of biopsy (n = 440) and those who received both IV antibiotics at the time of biopsy and outpatient antibiotics before/after biopsy (n = 327). Post biopsy infection was defined as at least one of the following: fever (≥ 38.3°C) with/without symptoms of urinary tract infection or positive urine culture (> 105 colony forming units) within 72 hours post biopsy. The rates of infection were compared between the two groups. RESULTS: A total of 767 biopsies were included in the study. Infection rate post TP biopsy was 1.83% (n = 14). The infection rate for patients with single dose prophylaxis was 2.05% (n = 9) and 1.53% (n = 5) for those that received the extended antibiotic regimen. No significant difference in infection rates between the different antibiotic regimens was found (p = 0.597). CONCLUSIONS: Overall rates of infection after TP prostate biopsy are very low. Our data indicate that single dose and extended regimen of antibiotic prophylaxis show similar infection rates. These findings support antibiotic stewardship and encourage further research into the appropriate regimen of prophylaxis for TP prostate biopsy.

Robotic assisted radical nephrectomy with Inferior vena cava tumor thrombus.

PURPOSE: Surgery for renal cell carcinoma (RCC) with an inferior vena cava (IVC) tumor thrombus can be done via a robotic approach. While this approach is thought to minimize blood loss, it may still result in significant losses (1) and current publications indicate that it can require upwards of 3-day hospital stays (1, 2). However, innovative surgical techniques, such as the split and roll, may curtail this. The purpose of this video is to present the case and surgical technique of robotic assisted radical nephrectomy with IVC thrombectomy. MATERIALS AND METHODS: The patient was a 77-year-old male found to have a right upper pole renal mass on CT urogram. On MRI (Figure 1), a renal mass and level II thrombus was seen. For this case, the Da Vinci Xi Intuitive robotic system was used, with four robotic 8-millimeter (mm) metallic trocars, two 5 mm assistant trocars, and one 12 mm air seal port. The split and roll technique were utilized to access the IVC and lumbar veins. This surgical method uses the adventitia of the IVC as a plane of dissection and safely identifies all branches/tributaries of the IVC to minimize the chance of vascular injury (3). RESULTS: Robotic console time was 150 minutes. The patient had an excellent outcome, with all tumor thrombus removed, less than 50cc of blood loss, and was discharged within 24 hours of the operation. The tumor pathology came back as papillary, high grade, and was stage pT3bN1. CONCLUSIONS: The robotic approach with split and roll technique is a great surgical option for urologists to consider in patients with RCC and a level I or II thrombus, which can minimize blood loss and expedite discharge.

The relationship between shoulder range of motion and elbow stress in college pitchers.

HYPOTHESIS: College pitchers with increased external rotation gain (ERG) produce increased medial elbow torque (elbow stress) whereas those with reduced total rotational range of motion (ROM) have reduced medial elbow torque during pitching. METHODS: Pitchers were recruited from 3 college baseball teams. Players with prior injury or on pitching restrictions because of pain were excluded. Players were evaluated within 2 weeks before their first game of the season. Pitchers completed an intake survey, and shoulder and arm measurements were taken. Pitchers were fitted with a baseball sleeve that included a sensor at the medial elbow. The sensor calculated elbow torque, arm speed, arm slot, and shoulder rotation for each pitch, while a radar gun measured peak ball velocity. After adequate warm-up, pitchers threw 5 fastballs in a standardized manner off the mound at game-speed effort. The primary outcome evaluated the relationship between shoulder ROM and medial elbow torque. Additional outcomes evaluated pitcher characteristics and demographic characteristics in the context of shoulder ROM. RESULTS: Twenty-eight pitchers were included in the preseason analysis. The average age and playing experience were 20.1 years (standard deviation [SD], 1.3 years) and 15.3 years (SD, 1.8 years), respectively, with 2.5 years (SD, 1.2 years) playing at collegiate level. The dominant shoulder showed decreased internal rotation and increased external rotation (ER) relative to the nondominant side (P < .001). The average glenohumeral internal rotation deficit and ERG were 11.3° (SD, 9.87°) and 5.71° (SD, 8.8°), respectively. ERG ≥ 5° was a significant predictor of elbow stress during pitching (47.4 Nm [SD, 0.7 Nm] vs. 45.1 Nm [SD, 0.6 Nm], P = .014). Univariate associations showed that each additional degree of ER resulted in increased elbow torque (ß estimate, 0.35 ± 0.06 Nm; P = .003). Conversely, decreased medial elbow torque was found in pitchers with reduced shoulder ROM (glenohumeral internal rotation deficit ≥ 20°: 43.5 Nm [SD, 1.1 Nm] vs. 46.6 Nm [SD, 0.5 Nm], P = .011; loss of total rotational ROM ≥ 5°: 43.6 Nm [SD, 1.1 Nm] vs. 46.6 Nm [SD, 0.5 Nm], P = .013) and in those with greater arm length (P < .05). CONCLUSIONS: College pitchers with increased ER produce greater medial elbow torque during the pitching movement. Each degree of increased ER was found to correlate with increased elbow torque and ball velocity. On the contrary, arm length and reduced shoulder ROM were associated with reduced medial elbow torque. This study suggests that increased ER in pitchers is associated with greater elbow stress during pitching.

High-Resolution Maxillofacial Computed Tomography Is Superior to Head Computed Tomography in Determining the Operative Management of Facial Fractures.

BACKGROUND: Computed tomography of the head (CTH) and maxillofacial bones (CTMF) can be performed concurrently, but CTMF is frequently ordered separately, after facial fractures identified on CTH scans. This study aims to evaluate whether obtaining additional CTMF after CTH changes operative management of patients with facial trauma. MATERIALS AND METHODS: A retrospective chart review was performed of all patients with facial trauma who presented to our level 1 trauma center between January 2009 and May 2019. CTH and CTMF were reviewed for each patient. Fracture numbers and patterns were compared to determine if CTMF provided additional information that necessitated change in management, based on predetermined criteria. RESULTS: A total of 1215 patients were assessed for facial trauma. Of them, 899 patients underwent both CTH and CTMF scans. CTH identified 22.7% less fractures than CTMF (P < 0.001); specifically, more orbital, nasal, naso-orbito-ethmoid, zygoma, midface, and mandible fractures (P < 0.001). Of all patients 9.2% (n = 83) of patients with nonoperative fractures on CTH were reclassified as operative on CTMF; 0.6% (n = 5) with operative patterns on CTH were reclassified as nonoperative on CTMF, and 18.1% (n = 163) experienced a changed in their operative plan though operative fractures were seen on both imaging modalities. Additional findings seen on CTMF delegated change in the operative plan in 27.9% (n = 251) of cases. CONCLUSIONS: CTMF scans are necessary to determine operative intervention. As CTH and CTMF are constructed from the data, physicians should consider ordering both scans simultaneously for all patients with facial trauma to limit radiation exposure, control costs, and avoid delays in care.

Sequential Intravesical Chemotherapy for Treatment Naïve, High-Risk Non-Muscle Invasive Bladder Cancer: Oncologic Outcomes, Tolerance, and Comparison to Contemporary Controls.

OBJECTIVE: To assess if receiving sequential intravesical chemotherapy (Gemcitabine-Docetaxel, Gem-Doce) therapy was associated with similar oncologic efficacy to bacillus Calmette-Guérin (BCG) in patients with treatment-naïve, high-risk non-muscle invasive bladder cancer (HR-NMIBC). METHODS: Single-center, retrospective cohort study of 80 patients with HR-NMIBC initiating first-line Gem-Doce or BCG between August 2020 and August 2023. Surveillance was conducted with cystoscopy, urine cytology, and cross-sectional imaging. The primary oncologic outcome was high-grade bladder tumor recurrence during surveillance. Kaplan-Meier method was applied to determine 12- and 24-month recurrence-free survival (RFS) after initiation of therapy. Tolerance of each intravesical therapies was assessed. RESULTS: About 53/80 (66%) received Gem-Doce and 27/80 (34%) received BCG with overall 18-month median follow-up. There were 10 recurrences after Gem-Doce and 7 after BCG. The RFS at 12- and 24-months for Gem-Doce (12-months: 87%, 24-months: 75%) was not significantly different than BCG (12-months: 85%, 24-months: 81%). Lastly, Gem-Doce had significantly fewer patients with AEs compared to BCG (40% vs 74%). Limitations include retrospective design, small cohort size, and intermediate oncologic follow-up. CONCLUSION: Our data suggest that sequential intravesical Gem-Doce is an oncologically efficacious and, potentially better tolerated, alternative to BCG for treatment-naïve HR-NMIBC.

Risk factors for infection and acute urinary retention following transperineal prostate biopsy.

PURPOSE: To calculate the frequency of infection and acute urinary retention (AUR) following transperineal (TP) prostate biopsy at a single high-volume academic institution and determine risk factors for developing these post-biopsy conditions. METHODS: Men undergoing TP prostate biopsy from 2012 to 2022 at our institution were retrospectively identified and chart reviewed. TP biopsies were performed with TR ultrasound (TRUS) guidance with anesthesia using a brachytherapy grid template. TRUS volumes were recorded during the procedure, and magnetic resonance imaging (MRI) volumes were calculated using the ellipsoid formula. When available, MRI volume was used for all analysis, and when absent, TRUS volume was used. AUR was defined as requiring urinary catheter placement within 72 h post-biopsy for inability to urinate. Univariable analysis was performed and variables with p < 0.1 and/or established clinical relevance were included in a backward binary logistic regression to produce an optimized model that fit the data without collinearity between variables. RESULTS: A total of 767 TP biopsies were completed in the study window. The frequency of infection was 1.83% (N = 14/767). The total frequency of AUR was 5.48% (N = 42/767). On multivariable regression, patients who went into AUR were five times as likely to develop infection (p = 0.020). Patients with infection post-TP biopsy were four times as likely to develop AUR (p = 0.047) and with prostates > 61.21 cc were three times as likely (p = 0.019). CONCLUSION: According to our model, AUR is the greatest risk factor for infection post-TP biopsy. With regard to AUR risks, infection post-biopsy and prostate size > 61.21 cc are the greatest risk factors.

Adoption of robot-assisted radical nephroureterectomy permits a minimally invasive option for management of upper tract urothelial carcinoma in geriatric patients: comparison with non-geriatric patients with intermediate-term oncologic follow-up.

To assess the oncologic efficacy and safety of robot-assisted approach to radical nephroureterectomy (RARNU) in geriatric versus younger patients with upper tract urothelial carcinoma (UTUC). A single-center, retrospective cohort study was conducted from 2009 to 2022 of 145 patients (two cohorts: < 75 and ≥ 75 years old) with non-metastatic UTUC who underwent RARNU. Primary endpoint was UTUC-related recurrence of disease during surveillance (bladder-specific and metastatic). Safety was assessed according to 30-day, modified Clavien-Dindo (CD) classifications (Major: C.D. III-V). Survival estimates were performed using Kaplan-Meier method. There were 89 patients < 75 years (median 65 years) and 56 patients ≥ 75 years (median 81 years). Comparing the young versus geriatric cohorts: median follow-up 38 vs 24 months (p = 0.03, respectively) with similar 3-year bladder-specific recurrence survival (60% vs 67%, HR 0.70, 95% CI [0.35, 1.40], p = 0.31) and metastasis-free survival (79% vs 70%, HR 0.71, 95% CI [0.30, 1.70], p = 0.44). Expectedly, the younger cohort had a significant deviation in overall survival compared to the geriatric cohort at 1-year (89% vs 76%) and 3-years (72% vs 41%; HR 3.29, 95% CI [1.88, 5.78], p < 0.01). The 30-day major (1% vs 0) and minor complications (8% vs 14%, p = 0.87). Limitations include retrospective study design of a high-volume, single-surgeon experience. Compared to younger patients with UTUC, geriatric patients undergoing RARNU have similar oncologic outcomes at intermediate-term follow-up with no increased risk of 30-day perioperative complications. Thus, age alone should not be used to disqualify patients from definitive surgical management of UTUC with RARNU.

Renal transplant nephrolithiasis: Presentation, management and follow-up with control comparisons.

Objectives: To analyse the presentation, management and long-term outcomes of renal transplant patients who formed kidney stones in their allograft. The secondary aim was to identify risk factors for stone formation in this cohort. Materials and Methods: Patient information from an institutional renal transplant database was used to identify individuals who both did and did not form kidney stones following renal transplantation. Computerized tomography (CT) imaging was used to make the diagnosis of kidney stones and measure stone size. Age- and gender-matched controls never forming a stone in their allograft were used for comparative analysis to identify risk factors for stone formation in transplant patients. Results: A total of 8835 transplant patients were included in the study, of which 128 (1.4%) formed a kidney stone in their allograft after surgery. The mean time to kidney stone identification was 6.2 years, and the mean number of stones formed was 1.7, with a mean maximum size dimension on a CT scan of 5.7 mm per stone. A total of 26 patients were subjected to stone-removing procedures, the most common being ureteroscopy (42.3%). The primary intervention failed in eight patients requiring a secondary intervention, and percutaneous nephrolithotomy (PCNL) had the lowest success rate (60%). A total of 164 controls were identified. In comparison to controls, stone formers had lower serum calcium (p = 0.008), lower estimated glomerular filtration rates (p = 0.019), higher lymphocyte counts (p = 0.021) and greater rate of urinary tract infection (p = 0.003). Graft failure rates were the same (p = 0.524), but time to graft failure was significantly longer in stone patients compared with controls (p = 0.008). Conclusions: The rate of stone formation is low in transplant patients. Success rates for stone treatment vary based on the surgery selected, with PCNL being the worst. Graft survival rates were equivocal, but survival time was better in stone patients. Our analysis calls for further investigation of this important topic.

The role of preoperative immune cell metrics in renal cell carcinoma with a tumor thrombus.

INTRODUCTION: The objective of this study was to stratify preoperative immune cell counts by cancer specific outcomes in patients with renal cell carcinoma (RCC) and a tumor thrombus after radical nephrectomy with tumor thrombectomy. METHODS: Patients with a diagnosis of RCC with tumor thrombus that underwent radical nephrectomy with thrombectomy across an international consortium of seven institutions were included. Patients who were metastatic at diagnosis and those who received preoperative medical treatment were also included. Retrospective chart review was performed to collect demographic information, past medical history, preoperative lab work, surgical pathology, and follow up data. Neutrophil counts, lymphocyte counts, monocyte counts, neutrophil to lymphocyte ratios (NLR), lymphocyte to monocyte ratios (LMR), and neutrophil to monocyte ratios (NMR) were compared against cancer-specific outcomes using independent samples t-test, Pearson's bivariate correlation, and analysis of variance. RESULTS: One hundred forty-four patients were included in the study, including nine patients who were metastatic at the time of surgery. Absolute lymphocyte count preoperatively was greater in patients who died from RCC compared to those who did not (2 vs 1.4; p < 0.001). Patients with tumor pathology showing perirenal fat invasion had a greater neutrophil count compared to those who did not (7.5 vs 5.5; p = 0.010). Patients with metastatic RCC had a lower LMR compared to those without metastases after surgery (2.5 vs 3.2; p = 0.041). Tumor size, both preoperatively and on gross specimen, had an interaction with multiple immune cell metrics (p < 0.05). CONCLUSIONS: Preoperative immune metrics have clinical utility in predicting cancer-specific outcomes for patients with RCC and a tumor thrombus. Additional study is needed to determine the added value of preoperative serum immune cell data to established prognostic risk calculators for this patient population.

Postsurgery Opiate Use Is Significantly Lower in Patients With Interstitial Cystitis/Bladder Pain Syndrome Following Cystectomy With Urinary Diversion.

OBJECTIVE: To compare pre-and post-operative opiate use in a large cohort of interstitial cystitis/bladder pain syndrome (IC/BPS) patients who underwent cystectomy with urinary diversion (CWUD). METHODS: A retrospective analysis was completed using a database of IC/BPS patients who underwent CWUD at a single institution from 2014 to 2022. In addition to demographic information, bladder capacity and Hunner lesion status were documented for each patient. Opiate use (milligram morphine equivalents [MME]) was calculated for each patient and change in MME (ΔMME) was calculated by subtracting pre-CWUD MME from post-CWUD MME. Paired t test was used to compare ΔMME for all parameters except age, where a Pearson's correlation was used. RESULTS: The analysis included 82 patients (17 M; 65 F) that underwent CWUD as follows: 53 ileal conduit diversions, 11 neobladders, and 18 Indiana Pouches. Mean pre-CWUD MME use was 4509.57 and mean post-CWUD MME was 1788.48 with a ΔMME of - 2721.09 (P < .001). ΔMME was not significantly different based on gender (P = .597), bladder capacity (P = .754), age (P = .561), or Hunner lesion status (P = .085). CONCLUSION: IC/BPS patients using opiates primarily for relief of pain directly related to their condition show a significant decrease in opiate use following CWUD, which likely represents significant pain reduction and implicates the bladder as the primary source of that pain.

Urothelial Carcinoma Recurrence With an Ileal Conduit: Multimodal Management With Extirpative Surgery, Chemotherapy, and Immunotherapy.

Ileal conduit (IC) is the most performed urinary diversion after radical cystectomy (RC) for urothelial carcinoma (UC) of the bladder. While UC recurrence after RC is well-described, recurrence of UC within a urinary diversion is much less prevalent, and thus, management of these lesions is not well understood. Here, we report the case of a 59-year-old male with a history of invasive UC with glandular differentiation of the urinary bladder who had carcinoma in situ recurrence after induction, intravesical Bacille Calmette-Guerin therapy. He underwent robot-assisted laparoscopic radical cystoprostatectomy (RALC) with bilateral pelvic lymph node dissection and intracorporal ileal conduit (IC) urinary diversion. Two years later, he presented to the emergency department with hematuria. Computed tomography demonstrated a mass within the IC. He subsequently underwent IC resection and ligation of bilateral ureters and had permanent nephrostomy tubes placed, with the final pathology confirming high-grade UC. Positron emission tomography revealed hypermetabolic soft tissue implants within the greater omentum and retroperitoneum for which he underwent fine-needle aspiration, demonstrating recurrence of poorly differentiated UC. Ultimately, the patient started treatment with systemic gemcitabine and carboplatin and completed 4 cycles before transitioning to maintenance avelumab therapy. No disease progression was noted at 16 months post-treatment. Herein, we present a review of the literature and our management of the present patient.

A Comprehensive Review of the Current State of Robot-assisted Laparoscopic Salvage Prostatectomy

ABSTRACT Background and Objective Salvage robot assisted radical prostatectomy (sRARP) is performed for patients with biochemical or biopsy proven, localized prostate cancer recurrences after radiation or ablative therapies. Traditionally, sRARP has been avoided by lower volume surgeons due to technical demand and high complication rates. Post-radiation sRARP outcomes studies exist but remain few in number. With increasing use of whole gland and focal ablative therapies, updates on sRARP in this setting are needed. The aim of this narrative review is to provide an overview of recently reviewed studies on the oncologic outcomes, functional outcomes, and complications after post-radiation and post-ablative sRARP. Tips and tricks are provided to guide surgeons who may perform sRARP. Materials and Methods We performed a non-systematic literature search of PubMed and MEDLINE for the most relevant articles pertaining to the outlined topics from 2010-2022 without limitation on study design. Only case reports, editorial comments, letters, and manuscripts in non-English languages were excluded. Key Content and Findings Salvage robotic radical prostatectomy is performed in cases of biochemical recurrence after radiation or ablative therapies. Oncologic outcomes after sRARP are worse compared to primary surgery (pRARP) though improvements have been made with the robotic approach when compared to open salvage prostatectomy. Higher pre-sRARP PSA levels and more advanced pathologic stage portend worse oncologic outcomes. Patients meeting low-risk, EAU-biochemical recurrence criteria have improved oncologic outcomes compared to those with high-risk BCR. While complication rates in sRARP are higher compared to pRARP, Retzius sparing approaches may reduce complication rates, particularly rectal injuries. In comparison to the traditional open approach, sRARP is associated with a lower rate of bladder neck contracture. In terms of functional outcomes, potency rates after sRARP are poor and continence rates are low, though Retzius sparing approaches demonstrate acceptable recovery of urinary continence by 1 year, post-operatively. Conclusions Advances in the robotic platform and improvement in robotic experience have resulted in acceptable complication rates after sRARP. However, oncologic and functional outcomes after sRARP in both the post-radiation and post-ablation settings are worse compared to pRARP. Thus, when engaging in shared decision making with patients regarding the initial management of localized prostate cancer, patients should be educated regarding oncologic and functional outcomes and complications in the case of biochemically recurrent prostate cancer that may require sRARP.

Robotic assisted radical nephrectomy with Inferior vena cava tumor thrombus

ABSTRACT Purpose: Surgery for renal cell carcinoma (RCC) with an inferior vena cava (IVC) tumor thrombus can be done via a robotic approach. While this approach is thought to minimize blood loss, it may still result in significant losses (1) and current publications indicate that it can require upwards of 3-day hospital stays (1, 2). However, innovative surgical techniques, such as the split and roll, may curtail this. The purpose of this video is to present the case and surgical technique of robotic assisted radical nephrectomy with IVC thrombectomy. Materials and Methods: The patient was a 77-year-old male found to have a right upper pole renal mass on CT urogram. On MRI (Figure 1), a renal mass and level II thrombus was seen. For this case, the Da Vinci Xi Intuitive robotic system was used, with four robotic 8-millimeter (mm) metallic trocars, two 5 mm assistant trocars, and one 12 mm air seal port. The split and roll technique were utilized to access the IVC and lumbar veins. This surgical method uses the adventitia of the IVC as a plane of dissection and safely identifies all branches/tributaries of the IVC to minimize the chance of vascular injury (3). Results: Robotic console time was 150 minutes. The patient had an excellent outcome, with all tumor thrombus removed, less than 50cc of blood loss, and was discharged within 24 hours of the operation. The tumor pathology came back as papillary, high grade, and was stage pT3bN1. Conclusions: The robotic approach with split and roll technique is a great surgical option for urologists to consider in patients with RCC and a level I or II thrombus, which can minimize blood loss and expedite discharge.

Interleukin-33-induced expression of PIBF1 by decidual B cells protects against preterm labor.

Preterm birth (PTB) is a leading cause of neonatal death worldwide. Intrauterine and systemic infection and inflammation cause 30-40% of spontaneous preterm labor (PTL), which precedes PTB. Although antibody production is a major immune defense mechanism against infection, and B cell dysfunction has been implicated in pregnancy complications associated with PTL, the functions of B cells in pregnancy are not well known. We found that choriodecidua of women undergoing spontaneous PTL harbored functionally altered B cell populations. B cell-deficient mice were markedly more susceptible than wild-type (WT) mice to PTL after inflammation, but B cells conferred interleukin (IL)-10-independent protection against PTL. B cell deficiency in mice resulted in a lower uterine level of active progesterone-induced blocking factor 1 (PIBF1), and therapeutic administration of PIBF1 mitigated PTL and uterine inflammation in B cell-deficient mice. B cells are a significant producer of PIBF1 in human choriodecidua and mouse uterus in late gestation. PIBF1 expression by B cells is induced by the mucosal alarmin IL-33 (ref. 9). Human PTL was associated with diminished expression of the α-chain of IL-33 receptor on choriodecidual B cells and a lower level of active PIBF1 in late gestation choriodecidua. These results define a vital regulatory cascade involving IL-33, decidual B cells and PIBF1 in safeguarding term pregnancy and suggest new therapeutic approaches based on IL-33 and PIBF1 to prevent human PTL.