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Introduction: En bloc kidney transplantation (EBKT) is a technique used to transplant pediatric kidneys to adult recipients, but can lead to certain complications seldom found in single-kidney transplantation. We report a case of renal artery embolization after EBKT due to intractable unilateral hydronephrosis and highlight the technical details and challenges of the procedure. Case: An 18-year-old female with MELAS syndrome underwent EBKT from a 10-month-old male baby. Two months later, the patient developed unilateral hydronephrosis and recurrent urinary tract infections, which was intractable to conventional therapy. Therefore, we underwent embolization of the problematic transplanted left kidney. Owing to the complicated anatomy and multiple angulations, multiple microcatheters, wires and support catheters were needed to select the renal arteries. Repeated procedures were required due to remnant flow from small branches and accessory renal arteries that were not easily visualized by conventional angiography, which were eventually detected by adjunctive use of 3-dimensional rotational angiography. Conclusions: Selective renal artery embolization after EBKT is challenging due to the short renal artery length and multiple angulations, yet it can still be performed safely and effectively by use of meticulous catheter-wire interactions and adjunctive intraoperative imaging techniques to delineate the precise anatomy of the target arteries. Clinical Impact: Selective renal artery embolization, which is less invasive than nephrectomy, can be considered if the culprit kidney must inevitably be sacrificed in en bloc kidney transplantation. [ABSTRACT FROM AUTHOR]

Purpose: Transarterial embolization of renal artery branches (RTE) is a minimally invasive procedure commonly performed in life-threatening renal bleeding of different etiologies. Despite the widespread use of RTE, no consensus guidelines are currently available. Our aim was to investigate clinical and technical efficacy and to identify potential predictors for clinical failure of this procedure. Methods: All the RTE procedures performed in our Interventional Radiology unit in last 10 years were retrospectively collected and analyzed. All selected patients underwent both pre-procedural computed tomography angiography (CTA) and post-procedural CTA within 30 days. Clinical success was considered as primary endpoint. Demographic, laboratory, and diagnostic findings predictive of clinical failure of RTE were identified. Results: Over a total of 51 patients enrolled, 27 (53%) were females and 33 (64.7%) had a renal bleeding of iatrogenic origin. Technical and clinical success was 100% and 80.4%, respectively. Hematoma volumes > 258.5 cm3 measured at CTA, higher pre- and post-procedural serum creatinine (Scr) levels, an increase in Scr value > 0.135 mg/dl after the procedure, a worse post-procedural estimated glomerular filtration rate (eGFR), a post-procedural reduction of eGFR < 3.350 ml/min, and a post-procedural reduction of platelet count (PLT) > 46.50 × 103/mmc showed a significantly higher rate of clinical failure. Conclusion: RTE is a safe and effective procedure in the management of acute renal bleeding of various origins. Hematoma volume, Scr, PLT, and eGFR values were found to be predictive factors of poor clinical outcome and should be closely monitored. [ABSTRACT FROM AUTHOR]

Introduction: Radical nephrectomy for Renal Cell Carcinoma (RCC) is still the treatment of choice for all stages except for stage I and IV, which need patient selectivity. The purpose of Renal Artery Embolization (RAE) pre-operative before radical nephrectomy is to facilitate resection, reduce bleeding, and reduce the time to surgery, but the necessity of this procedure is still debatable. This study investigates the efficacy of pre-operative Renal Artery Embolization (PRAE) before radical nephrectomy for RCC patients. Methods: The systematic searches based on PRISMA guidelines were conducted in Pubmed, Scopus, Web of Science, Medrxiv, and ScienceDirect databases with pre-defined keywords. Both analyses, quantitative and qualitative, were performed to assess blood loss, transfusion rate, surgical time, Intensive Care Unit (ICU) stay, and hospital stay. Results: A total of 921 patients from 8 eligible studies were included. The blood loss was significantly lower in the PRAE group compared to the control group (p = < 0.00001; SMD -20 mL; 95%CI -0.29, -0.12). There is no statistically significant difference between RAE and without RAE in the transfusion rate nephrectomy (p = 0.53, OR 0.65; 95% CI 0.16, 2.57), mean operative time (p = 0.69; SMD 5.91; 95% CI -23.25, 35.07), mean length of hospital stay (p = 0.05; SMD 0.56; 95% CI 0.00, 1.12), and mean length of stay in the ICU (p = 0.45; SMD 11.61; 95% CI -18.35, 41.57) Conclusions: PRAE before radical nephrectomy significantly reduces blood loss in RCC patients but is similar in the surgical time, transfusion rate, and length of hospital stay and ICU stay.

Succinate dehydrogenase (SDH)-deficient renal cell carcinoma (RCC) is a new subtype of RCC included in the 2016 edition of the WHO classification in RCC. SDH-defective RCC accounts for 0.05–0.2%, and preoperative diagnosis is difficult. We report a severe adherent RCC of inferior vena cava that underwent open radical nephrectomy after preoperative renal artery embolization. Postoperative histopathological examination diagnosed SDH-defective RCC; the clinicopathological stage was pT2b. After 10 months of follow-up, the patient had no evidence of disease recurrence. For patients with large RCC, interventional embolization can be selected to reduce intraoperative bleeding and blood transfusion, and it is recommended to complete interventional surgery within 3–4 h before surgery. SDH-deficient RCC is difficult to distinguish from other renal tumors in imaging, so immunohistochemical examination of SDHB is recommended for young and middle-aged patients, especially those under 45. [ABSTRACT FROM AUTHOR]

Abstract Background Since renal cell carcinoma(RCC) is insensitive to conventional chemoradiotherapy, molecularly targeted drugs are commonly used treatments for unresectable advanced RCC. The aim of this study was to explore the efficacy and safety of TACE + sunitinib vs. sunitinib in the treatment of unresectable advanced RCC. Methods This study included 98 patients with unresectable advanced RCC who were treated in Union Hospital from January 2015 to December 2018, and they met the criteria. They were divided into two groups: TACE + Sunitinib group (N = 47) and Sunitinib group (N = 51). We conducted a retrospective study to analyze the efficacy and safety of the two groups of patients. Results (1)TACE + Sunitinib group: 4 patients (8.5%) achieved CR, 27 patients (57.5%) achieved PR, 9 patients (19.1%) achieved SD, and 7 patients (14.9%) achieved PD. Sunitinib group, 0 patients (0%) achieved CR, 20 patients (39.2%) achieved PR, 14 patients (27.5%) achieved SD, and 17 patients (33.3%) achieved PD. (P = 0.017) (2)ORR: TACE + sunitinib group, 66.0%; sunitinib group, 39.2%. (P = 0.009) (3)DCR: TACE + sunitinib group, 85.1%; sunitinib group, 66.7%. (P = 0.038) (4) In the TACE + sunitinib group, mPFS was 15.6 months, mOS was 35.0 months; in the sunitinib group, the mPFS was 10.9 months, mOS was 25.7 months. (P

Higher turnaround of urologic patients in the tertiary clinical center can lead to more accompanying complications, ranging from 1% to 55% for various procedures, with the incidence of vascular injuries varying from 0.43% up to 9.5%. In patients with impaired renal function, it is imperative to prevent the loss of normal kidney function and potential hemodialysis. Being minimally invasive, endovascular procedures such as renal artery embolization (RAE) can treat major and life-threatening complications, but good and prompt communication between urologists and interventional radiologist is necessary for fast and effective treatment. Absolute contraindications for RAE are the presence of acute infection and previously known anaphylactic reaction to the iodine contrast media, while previous mild or moderate allergic reactions to iodine contrast media are not contraindications for RAE. Currently used embolic agents can be divided into temporary and permanent embolization agents. While the temporary embolization agent available is a gelatin sponge that could be used as complementary material or stand-alone, for permanent embolization interventional radiologists use microparticles, microspheres, liquid embolic agents, coils, and microcoils. RAE procedures are considered to be safe with a low incidence of complications, with non-target embolization being the most serious one. Postembolization syndrome is considered to be the most common adverse effect and it involves around 90% of patients. The overall results show that RAE is a safe, minimally invasive procedure that can effectively treat significant complications caused by other urologic procedures, with the reported success rates of 87%-100%.

Polycystic kidney disease (PKD) is a genetic disorder characterized by the formation of multiple cysts in the kidneys. We present a case of a 47-year-old male with PKD on dialysis who underwent bilateral renal artery embolization followed by bilateral nephrectomy via a median incision. The specimen weight was 5 kg for the left kidney and 8 kg for the right one. Renal artery embolization can be a useful tool in managing polycystic kidney disease in cases where nephrectomy is indicated. This case highlights the importance of timely intervention and the role of minimally invasive techniques in managing this rare condition.

Background: Since renal cell carcinoma(RCC) is insensitive to conventional chemoradiotherapy, molecularly targeted drugs are commonly used treatments for unresectable advanced RCC. The aim of this study was to explore the efficacy and safety of TACE + sunitinib vs. sunitinib in the treatment of unresectable advanced RCC. Methods: This study included 98 patients with unresectable advanced RCC who were treated in Union Hospital from January 2015 to December 2018, and they met the criteria. They were divided into two groups: TACE + Sunitinib group (N = 47) and Sunitinib group (N = 51). We conducted a retrospective study to analyze the efficacy and safety of the two groups of patients. Results: (1)TACE + Sunitinib group: 4 patients (8.5%) achieved CR, 27 patients (57.5%) achieved PR, 9 patients (19.1%) achieved SD, and 7 patients (14.9%) achieved PD. Sunitinib group, 0 patients (0%) achieved CR, 20 patients (39.2%) achieved PR, 14 patients (27.5%) achieved SD, and 17 patients (33.3%) achieved PD. (P = 0.017) (2)ORR: TACE + sunitinib group, 66.0%; sunitinib group, 39.2%. (P = 0.009) (3)DCR: TACE + sunitinib group, 85.1%; sunitinib group, 66.7%. (P = 0.038) (4) In the TACE + sunitinib group, mPFS was 15.6 months, mOS was 35.0 months; in the sunitinib group, the mPFS was 10.9 months, mOS was 25.7 months. (P < 0.001) (5) The incidence of abdominal pain, fever, and vomiting was higher in the TACE + sunitinib group than in the sunitinib group (abdominal pain: 55.3% vs. 13.7%; fever: 61.7% vs. 7.8%; vomiting: 40.4% vs. 19.6%; P < 0.05). The technical success rate of TACE in TACE + Sunitinib group is 100%. Conclusions: The TACE + sunitinib group had higher ORR and DCR, longer OS and PFS than the sunitinib alone group. TACE combined with sunitinib can play a complementary role and is a safe and effective treatment for advanced RCC. [ABSTRACT FROM AUTHOR]

Renal artery pseudoaneurysms have been infrequently reported in the literature. In the present report, we have described a case of a ruptured renal artery pseudoaneurysm requiring coil embolization. A 49-year-old man had presented to our institution with a hypertensive emergency. Computed tomography revealed a 3.4-cm right renal artery pseudoaneurysm. Nonemergent coil embolization was planned for the following day. However, he became hypotensive, exsanguinating frank blood from the urethra. An arteriogram showed extravasation of contrast into the pseudoaneurysm sac, renal pelvis, and ureter, consistent with intrarenal pseudoaneurysm rupture. We have demonstrated coil embolization as a method of repairing a ruptured renal artery pseudoaneurysm with gross hematuria.

Angiomyolipoma is a benign mesenchymal tumour of kidney that consists of adipose tissue, muscle cells and blood vessels. Renal angiomyolipomas represent almost one percent of all renal tumours. We reported a case of a 50-year-old woman complaining of mild abdominal discomfort with no other symptoms and no remarkable medical history. Clinical examination was inconclusive and no lump was palpable in abdomen. Ultrasonography raised the suspicion of existence of a large, homogeneous, hyperechoic tissue mass arising from right kidney. Abdominal computed tomography scan suggested the presence of giant angiomyolipoma of right kidney. The histopathological examination confirmed the diagnosis of renal angiomyolipoma. The patient underwent open simple nephrectomy to remove the tumour without any complications. We documented a rare case of retroperitoneal angiomyolipoma with extrusion of fat content from the renal hilum breaching the cortex as peculiarity which presented just as mild abdominal discomfort., Competing Interests: None declared., (Published by Oxford University Press and JSCR Publishing Ltd. © The Author(s) 2024.)

Objective: To evaluate the prevalence, risk factors, clinical manifestations, and outcomes of subcapsular renal hematoma (SRH) following ureterolithotripsy., Patients and Methods: Between January 2014 and December 2023, patients who underwent ureterorenoscopy lithotripsy (URL) at our hospital were retrospectively reviewed. Clinical data including basic information, calculi-related indicators, and perioperative period data were collected. A Student's t -test was used for continuous data, while a Chi-square test or Fisher's exact test was utilized for categorical data., Results: A total of 2098 patients treated with URL for ureteric stones were included in this study. The incidence of SRH after URL was 0.52% (11 cases). All SRH cases were confirmed by non-contrast computed tomography, with an average patient age of 55.54 years (range 34-84). The mean stone size in patients with SRH was 10.54 cm (range 0.8-1.5). Patients with SRH had a higher proportion of severe hydronephrosis caused by ureteral stones (54.55% vs 26.07%, p  = 0.032) and narrow ureters (45.45% vs 8.04%, p  < 0.001) compared to those without SRH. Patients with SRH experienced a longer length of stay, with a significant difference between the two groups (11.64 ± 5.05 vs 3.87 ± 8.12, p  < 0.001). Nine patients were managed conservatively without further intervention, while embolization was required in one patient and percutaneous drainage was performed in another. All SRH cases resolved completely during a 4-month follow-up., Conclusions: The incidence of SRH following URL is low, with severe hydronephrosis and narrow ureters identified as risk factors. Most SRH cases can be successfully managed conservatively, although patients with SRH may experience a significant prolongation of their length of stay., Competing Interests: Declaration of conflicting interestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

OBJECTIVE: Life-threatening renal hemorrhage after flexible ureterorenoscopy and laser lithotripsy (FURSL) is a rare complication. We aim to review our unit's experience with super-selective renal artery embolization as therapeutic options for such patients. METHODS: From January 2015 to November 2021, total 1125 patients underwent the FURSL procedures in our unit. Patients with life-threatening renal hemorrhage were reviewed and the information of peri-operative, operative and post-operative were recorded. RESULTS: Of the 1125 patients who underwent FURSL procedure, two patients with life-threatening renal hemorrhage were diagnosis; the age is 67 and 42 years old, respectively. Preoperative imaging examination showed that two patients had upper ureteral stone and renal stone ranging in size from 1.2 to 3.0 cm. Female patient placed the D-J stent for two weeks before FURSL. After the operation, both patients had the massive gross hematuria, significant drop of hemoglobin (Hgb), blood pressure lowering and needed to transfusion. CT scan showed that the male patient had an intrarenal hematoma. All these two were treated by super-selective renal artery embolization and had a successful outcome. CONCLUSION: Life-threatening renal hemorrhage after FURSL is a rare and severe complication. Super-selective renal artery embolization is a safe and effective method for the treatment of patients with severe renal hemorrhage, preserving healthy renal parenchyma and renal function. [ABSTRACT FROM AUTHOR]

OBJECTIVE: To probe into the effects of renal artery embolization combined with Adrenal hydrazone tablets on coagulation function and renal function in patients with acute renal hemorrhage. METHODS: A total of 61 patients with acute renal hemorrhage admitted into the Ninth People’ s Hospital Affiliated to Shanghai Jiaotong University School of Medicine from Sept. 2019 to Sept. 2021 were selected and divided into the single treatment group ( n = 30) and the combined treatment group (n = 31) via random number table. The single treatment group was treated with renal artery embolization, while the combined treatment group received renal artery embolization combined with Adrenal hydrazone tablets. The renal function of two groups was compared. Plasma prothrombin time (PT), activated partial thrombin time ( APTT) and fibrinogen ( FIB) levels were determined by immunoturbidimetry, and tumor necrosis factor α (TNF-α), interleukin ( IL)-1 and IL-22 levels were determined by enzyme-linked immunosorbent assay. The treatment effects and incidence of complications were observed. RESULTS: After treatment, the levels of hematocrit and hemoglobin in the combined treatment group were higher than those in the single treatment group, and the heart rate was lower than that in the single treatment group, with statistically significant differences (P<0. 05). After treatment, the levels of serum creatinine, 24 h urine protein and blood urea nitrogen in the combined treatment group were lower than those in the single treatment group, the differences were statistically significant (P< 0. 05). After treatment, PT and APTT in the combined treatment group were longer than those in the single treatment group, and the levels of FIB, TNF-α, IL-1 and IL-22 were lower than those in the single treatment group, the differences were statistically significant ( P < 0. 05 ). The total effective rate in the combined treatment group was 96. 77% (30 / 31), higher than 76. 67% (23 / 30) in the single treatment group; the incidence of complications in the combined treatment group was 3. 23% (1 / 31), lower than 20. 00% (6 / 30) in the single treatment group, the difference was statistically significant ( P < 0. 05). CONCLUSIONS: Renal arterial embolization combined with Adrenal hydrazone tablets in the treatment of acute renal hemorrhage can improve the renal function and the coagulation function, effectively regulate the inflammatory reaction, with remarkable therapeutic effects. [ABSTRACT FROM AUTHOR]

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Tanapoom Limtrakul,1 Ukrit Rompsaithong,1 Anucha Ahooja,2 Pakorn Kiatsopit,1 Supanut Lumbiganon,1 Kachit Pachirat,1 Wichien Sirithanaphol1 1Department of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand; 2Department of Radiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, ThailandCorrespondence: Wichien SirithanapholDepartment of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, ThailandTel +66-43-363664Fax +66-43-202491Email wichsir@kku.ac.thBackground: Emergency renal artery embolization (RAE) is a useful method in treating renal trauma and bleeding renal tumors. The aim of this study was to evaluate the clinical efficacy and safety of emergency RAE, and factors associated with RAE failure.Methods: This retrospective study included patients treated with emergency RAE for acute renal hemorrhage between 1 January 2009 and 31 October 2019 in Srinagarind Hospital. The embolization was performed using coils, glues, and/or gel foams. Factors associated with unsuccessful outcomes were analyzed using univariate and multivariate regression analyses.Results: A total of 94 patients were treated at the center during the study period with the clinical success rate of 91.5%. The most common cause of acute renal hemorrhage was iatrogenic injury (76.5%). Factors associated with unsuccessful RAE according to multivariate analyses were hypertension (adjusted odds ratio [AOR] 24.2) and ruptured tumor/aneurysm (AOR 26.8).Conclusion: RAE is an effective procedure for acute renal hemorrhage. Hypertension and ruptured tumor/aneurysm were negative predictors for success.Keywords: renal artery embolization, renal trauma, renal hemorrhage, PCNL, kidney biopsy, renal tumor

Introduction: Hematuria following iatrogenic trauma or renal vascular malformations is less common but important causes warranting definite emergency procedure in cases not responding to conservative management. Endovascular embolization is accepted as an effective technique for the treatment of acute intractable hematuria. Considering the need of microcatheter for selective embolization, its use during the procedure increases the procedural cost significantly. The purpose of the present study is to assess the effectiveness and safety of selective renal artery embolization in patients with intractable hematuria using a 4-F glide catheter (GC). The microcatheter usage during our study was intended to be restricted to cases where the GC was not navigable to the optimal site for embolization. Materials and Methods: A retrospective analysis was done for 21 cases with acute intractable hematuria referred to our center between January 2015 and February 2019. Fifteen male and 6 female patients were included. Seventeen cases followed iatrogenic injury during a renal biopsy, 2 cases were due to renal neoplasm, and 1 each due to PCN and abdominal trauma. Embolization was carried out after selective catheterization of the feeding artery, with a 4-F GC using polyvinyl alcohol (PVA) particles in combination with pushable coils in all cases. Results: The source of bleeding was identified as arteriovenous fistula (AVF) in 14, AVF with pseudoaneurysm (PA) in 3, PA alone in 2, and abnormal tumor vascularity in 2 patients. In all but 2 cases, the hematuria stopped within 24 h after embolization. In the remaining 2 cases, hematuria stopped completely within 72 h. One patient developed minor puncture site bleed with no major procedural complications or recurrence on follow-up. Conclusion: Endovascular embolization is a highly effective minimally invasive technique for the treatment of acute intractable hematuria. Good results were achieved without using any microcatheter (hence cost-effective) with no clinically significant nontarget embolization.

Renal cell carcinoma (RCC) accounts for most renal malignancies. This article, the last in a three-part series, presents treatment options for RCC using the American Joint Com- mittee on Cancer Tumor, Node, and Metastasis staging system as a framework, as well as nursing-care options for patients undergoing partial or radical nephrectomy. [ABSTRACT FROM AUTHOR]

Objectives: To evaluate the safety and effectiveness of transcatheter arterial embolization for controlling spontaneous hemorrhage in patients with acquired cystic kidney disease (ACKD). Methods: This retrospective study included 18 patients with ACKD (M:F=13:5; mean age, 56 years) who underwent renal artery embolization to control spontaneous hemorrhage between January 2001 and September 2020. The underlying etiology and clinical presentations were reviewed and previous computed tomography (CT) findings were analyzed. Furthermore, angiographic and embolization details, technical and clinical successes, and complications were assessed. Results: Subcapsular, perirenal, and pararenal hematomas were observed on CT scans for all patients. Contrast extravasation was observed in 15 / 17 patients (88%) on contrast-enhanced CT scans. Angiography showed active bleeding in 14 patients (78%; contrast extravasation [n=6], pseudoaneurysm [n=3], and both [n=5]), suspicious bleeding in 1 (5%), and no bleeding in 3 (17%). The technical and clinical success rates were 100% and 94% (17/18), respectively. Total and partial embolization was performed in 14 (78%) and 4 (22%) cases, respectively. Subsequent surgical nephrectomy was required for one patient with clinical failure due to recurrent bleeding despite total embolization. Procedure-related complications included mild post-embolization syndrome in one patient and contrast-induced nephropathy in five patients (28%) without long-term complications. Conclusions: Renal artery embolization is safe and effective for controlling spontaneous renal hemorrhage in patients with ACKD. [ABSTRACT FROM AUTHOR]

Background: Percutaneous nephrolithotomy (PCNL) is a minimally invasive technique for treating renal stone disease and well-established postoperative complications in the literature. Bleeding is one of the most common and significant complication of PCNL [1]. Treatment of this complication is commonly conservative including blood transfusion, which is enough for the relief of symptoms. But in a small number of patients, transcatheter angioembolization (TCA) is needed for persistent bleeding [2]. Coil migration is a rare complication of TCA [3]. Objectives: In this study, we present a migrated coil into the collecting system after angioembolization for bleeding-related PCNL. Case presentation: A 52 years old patient with left solitary kidney underwent PCNL. The operation was finished uneventfully, but bleeding occurs after the procedure and treated with TCA. The patient was discharged after the relief of symptoms. After two years, the patient had started complaining left flank pain. A huge metal coil wire was founded in X-ray KUB. The coil wire was filling the renal pelvis and prolapsing to the proximal ureter. A Double J stent was inserted to the patient for preparing to flexible ureteroscopy. Ureterorenoscopy was performed, and extraluminal coil wires were cut off using a holmium laser (1.2 J &10 Hz; 12 watt) and extracted with forceps. The operation was performed using semirigid ureteroscope. No ureteral access sheath was used due to adequate ureteral diameter allowing safe retrieval of the coil while minimizing operative time, complications, and eliminating the need for stenting. Ureteral stent was not inserted. The postoperative period was uneventful, and the patient discharged in the postoperative 1st day. The patient was under follow up without any problem for two years and did not underwent a second procedure for the tips of coils. Conclusion: Coil migration is a late and rare complication of embolization. Management of coil migration is commonly surgical. The antegrade and retrograde approaches are minimally invasive methods with a high success rate. The retrograde approach provides urologists with a safe and effective way to remove migrated coils due to the lower risk of bleeding and hospitalization time than the percutaneous approach.

Gestational choriocarcinoma with kidney and lung metastases with delayed presentation after term pregnancy is rare event and not described frequently in literature. We describe a rare case of 24-year-old female with hematuria after 3 years of term delivery. Management includes chemotherapy and even renal embolization in case of life threatening hematuria.

Hemorrhage after robotic-assisted partial nephrectomy (RAPN) is uncommon but can cause significant morbidity. We present a case of acute hemorrhage isolated to the collecting system that was managed with renal artery embolization (RAE).A 76-year-old male developed sudden onset transfusion-dependent hematuria and hypotension following uncomplicated RAPN. He had no signs of intra-abdominal bleeding and his hypotension was responsive to volume resuscitation. Renal angiography identified a segmental artery with extravasation into the collecting system. RAE eliminated the patient's hematuria, the need for further transfusion, and allowed preservation of renal function. RAE is a viable option for collecting system hemorrhage following RAPN.

Recent developments in endovascular radiological techniques and devices have rendered embolization a major therapeutic option prior to surgery in many renal vascular or neoplastic diseases. A 19-yearold female patient, with a diagnosis of tuberous sclerosis complex (TSC) in childhood, was admitted with severe anemia. Polycystic kidney disease in end-stage renal failure appeared four years before and the patient has been undergoing peritoneal dialysis. The patient’s medical history also included bilateral renal angiomyolipomas (AMLs). One year earlier, a unilateral endovascular embolization was performed to repair a bleeding aneurysm at the right renal upper pole. A second bilateral ruptured renal aneurysm was diagnosed at admission. To continue with peritoneal dialysis and prevent intrarenal hemorrhage and intraperitonal bleeding, an urgent bilateral renal AE was performed. Two months later she underwent a bilateral retroperitoneal nephrectomy. The posterior surgical approach, preserved the peritoneal surface area and adequate conditions to continue dialysis. At histology, bilateral AMLs were confirmed and a renal cell carcinoma of the right kidney was concurrently discovered. She undergoes continuous peritoneal dialysis. Urgent selective renal AE represents a feasible treatment for bilateral AML bleeding. It is safe and feasible before performing nephrectomy in patients with end-stage renal failure.

Nowadays, there is a tendency in surgery to use more minimally invasive surgical procedures to decrease the risk of intra- and postoperative complications and to reach a faster rehabilitation period. We report a case of successful simultaneous minimally invasive treatment of a patient with kidney tumor. According to ultrasound examination data, the patient had a tumor in the right kidney. A computed tomography scan of the abdomen verified the tumor and detected a thrombus in the inferior vena cava lumen. Embolization of the right renal artery was performed as the first stage in the hybrid operating room. Right-side nephrectomy and thrombectomy from inferior vena cava, as the second stage, were done by using a robotic surgical system. The feature of this case is that embolization and nephrectomy were simultaneously performed during one surgical procedure. On the 10th day, the patient was discharged from the hospital without any signs of deterioration and complications. Thus, the unique work of two surgical teams proficient in mini-invasive technologies allowed to eliminate tumors and tumor thrombi in a single procedure and to reduce the bleeding, in-hospital stay, and rehabilitation period. This method will help more patients with kidney tumors in the future.

Introduction: Hematuria following iatrogenic trauma or renal vascular malformations is less common but important causes warranting definite emergency procedure in cases not responding to conservative management. Endovascular embolization is accepted as an effective technique for the treatment of acute intractable hematuria. Considering the need of microcatheter for selective embolization, its use during the procedure increases the procedural cost significantly. The purpose of the present study is to assess the effectiveness and safety of selective renal artery embolization in patients with intractable hematuria using a 4-F glide catheter (GC). The microcatheter usage during our study was intended to be restricted to cases where the GC was not navigable to the optimal site for embolization. Materials and Methods: A retrospective analysis was done for 21 cases with acute intractable hematuria referred to our center between January 2015 and February 2019. Fifteen male and 6 female patients were included. Seventeen cases followed iatrogenic injury during a renal biopsy, 2 cases were due to renal neoplasm, and 1 each due to PCN and abdominal trauma. Embolization was carried out after selective catheterization of the feeding artery, with a 4-F GC using polyvinyl alcohol (PVA) particles in combination with pushable coils in all cases. Results: The source of bleeding was identified as arteriovenous fistula (AVF) in 14, AVF with pseudoaneurysm (PA) in 3, PA alone in 2, and abnormal tumor vascularity in 2 patients. In all but 2 cases, the hematuria stopped within 24 h after embolization. In the remaining 2 cases, hematuria stopped completely within 72 h. One patient developed minor puncture site bleed with no major procedural complications or recurrence on follow-up. Conclusion: Endovascular embolization is a highly effective minimally invasive technique for the treatment of acute intractable hematuria. Good results were achieved without using any microcatheter (hence cost-effective) with no clinically significant nontarget embolization. [ABSTRACT FROM AUTHOR]

Abstract Background Renal denervation (RDN) is a promising therapeutic method in cardiology. Its currently most investigated indication is resistant hypertension. Other potential indications are atrial fibrillation, type 2 diabetes mellitus and chronic renal insufficiency among others. Previous trials showed conflicting but promising results, but the real benefits of RDN are still under investigation. Patients with renal insufficiency and resistant hypertension are proposed to be a good target for this therapy due to excessive activation of renal sympathetic drive. However, only limited number of studies showed benefits for these patients. We hypothesize that in our experimental model of chronic kidney disease (CKD) due to ischemia with increased activity of the renin–angiotensin–aldosterone system (RAAS), renal denervation can have protective effects by slowing or blocking the progression of renal injury. Methods An experimental biomodel of chronic renal insufficiency induced by ischemia was developed using selective renal artery embolization (remnant kidney porcine model). 27 biomodels were assessed. Renal denervation was performed in 19 biomodels (denervated group), and the remaining were used as controls (n = 8). The extent of renal injury and reparative process between the two groups were compared and assessed using biochemical parameters and histological findings. Results Viable remnant kidney biomodels were achieved and maintained in 27 swine. There were no significant differences in biochemical parameters between the two groups at baseline. Histological assessment proved successful RDN procedure in all biomodels in the denervated group. Over the 7-week period, there were significant increases in serum urea, creatinine, and aldosterone concentration in both groups. The difference in urea and creatinine levels were not statistically significant between the two groups. However, the level of aldosterone in the denervated was significantly lower in comparison to the controls. Histological assessment of renal arteries showed that RDN tends to produce more damage to the arterial wall in comparison to vessels in subjects that only underwent RAE. In addition, the morphological damage of kidneys, which was expressed as a ratio of damaged surface (or scar) to the overall surface of kidney, also did not show significant difference between groups. Conclusions In this study, we were not able to show significant protective effect of RDN alone on ischemic renal parenchymal damage by either laboratory or histological assessments. However, the change in aldosterone level shows some effect of renal denervation on the RAAS system. We hypothesize that a combined blockade of the RAAS and the sympathetic system could provide more protective effects against acute ischemia. This has to be further investigated in future studies.

Objectives: To present our series of patients with penetrating renal trauma treated at two urban major trauma centres and to discuss the contemporary management of such injuries. Methods: We reviewed prospective urological trauma databases for all patients presenting with penetrating renal trauma between January 2005 and October 2016. Patient demographics, clinical characteristics, imaging, management and follow-up data were analysed. Results: Over the 11-year period, 63 patients presented with penetrating renal injuries. The vast majority of patients were male (n = 61; 96.8%), with a mean (range) age of 27.4 (14-71) years. Injuries were equally common on either side (31 left, 32 right). The most common mechanism of injury was stabbing (n = 55; 87.3%), followed by gunshot (n = 7; 11.1%) and crossbow injuries (n = 1; 1.6%). All patients underwent contrast-enhanced computed tomography. Using the American Association for the Surgery of Trauma renal injury grading system, 11 (17.5%) had grade II, 26 (41.3%) had grade III and 26 (41.3%) had grade IV injury. The most common associated injuries were thoracic (n = 23; 36.5%), liver (n = 11; 17.5%), splenic (n = 10; 15.9%), gastrointestinal tract (n = 8; 12.7%) and musculoskeletal (n = 6; 9.5%). At presentation, 16 patients (25.4%) were haemodynamically unstable. The majority of patients did not require blood transfusion (n = 56; 88.9%), while transfusion of >5 units was rare (n = 4; 6.3%). Fifty-two patients (82.5%) were managed by observation alone, while 10 (15.9%) underwent emergency angiography and embolization. Patients with grade IV injury were more likely to require embolization than those with grade III injury; however, the difference was not significant (26.9% vs 15.4%; P = 0.29). One patient (1.6%) underwent retroperitoneal exploration of their renal injury and was managed conservatively. Eight patients underwent laparotomy for other visceral injuries while their renal injury was managed conservatively. Renal artery pseudoaneurysm developed in five patients (7.9%) and one patient (1.6%) developed renal arteriovenous malformation. No patients underwent nephrectomy and no mortality was reported. Conclusions: The vast majority of patients with penetrating renal injuries can be safely managed non-operatively in this setting. Selective renal artery embolization is an effective option for patients in an unstable condition, with excellent outcomes. Associated thoracic or visceral injuries requiring operative management are common in penetrating renal trauma, while urologists should limit or have a high threshold for surgical intervention. [ABSTRACT FROM AUTHOR]

Background: Renal denervation (RDN) is a promising therapeutic method in cardiology. Its currently most investigated indication is resistant hypertension. Other potential indications are atrial fibrillation, type 2 diabetes mellitus and chronic renal insufficiency among others. Previous trials showed conflicting but promising results, but the real benefits of RDN are still under investigation. Patients with renal insufficiency and resistant hypertension are proposed to be a good target for this therapy due to excessive activation of renal sympathetic drive. However, only limited number of studies showed benefits for these patients. We hypothesize that in our experimental model of chronic kidney disease (CKD) due to ischemia with increased activity of the renin-angiotensin-aldosterone system (RAAS), renal denervation can have protective effects by slowing or blocking the progression of renal injury.Methods: An experimental biomodel of chronic renal insufficiency induced by ischemia was developed using selective renal artery embolization (remnant kidney porcine model). 27 biomodels were assessed. Renal denervation was performed in 19 biomodels (denervated group), and the remaining were used as controls (n = 8). The extent of renal injury and reparative process between the two groups were compared and assessed using biochemical parameters and histological findings.Results: Viable remnant kidney biomodels were achieved and maintained in 27 swine. There were no significant differences in biochemical parameters between the two groups at baseline. Histological assessment proved successful RDN procedure in all biomodels in the denervated group. Over the 7-week period, there were significant increases in serum urea, creatinine, and aldosterone concentration in both groups. The difference in urea and creatinine levels were not statistically significant between the two groups. However, the level of aldosterone in the denervated was significantly lower in comparison to the controls. Histological assessment of renal arteries showed that RDN tends to produce more damage to the arterial wall in comparison to vessels in subjects that only underwent RAE. In addition, the morphological damage of kidneys, which was expressed as a ratio of damaged surface (or scar) to the overall surface of kidney, also did not show significant difference between groups.Conclusions: In this study, we were not able to show significant protective effect of RDN alone on ischemic renal parenchymal damage by either laboratory or histological assessments. However, the change in aldosterone level shows some effect of renal denervation on the RAAS system. We hypothesize that a combined blockade of the RAAS and the sympathetic system could provide more protective effects against acute ischemia. This has to be further investigated in future studies. [ABSTRACT FROM AUTHOR]

Though generally considered benign, angiomyolipomas can invade through the renal vein into the inferior vena cava, putting patients at risk of catastrophic pulmonary fat embolization. Venous invasion is thus an indication for surgical resection but is thought to increase the risk of adverse operative outcomes including intraoperative hemorrhage and embolization of fat and/or tumor thrombus. We report a novel approach to mitigating these complications illustrated in the case of a 43-year-old woman with IVC-invasive renal AML who underwent successful radical nephrectomy after concurrent pre-operative renal artery embolization and placement of a retrievable suprarenal IVC filter. [ABSTRACT FROM AUTHOR]

Objective: To examine outcomes of clinical procedures for renal angiomyolipoma associated with tuberous sclerosis complex (TSC) based on US national health claims databases.Methods: This retrospective cohort study selected two cohorts of TSC patients, who underwent either embolization or nephrectomy (either partial or complete) for renal angiomyolipoma in the years from 2000 through 2011. Based on claims diagnosis codes, we estimated the prevalence rates of 10 angiomyolipoma-related conditions and 50 embolization- or nephrectomy-related conditions in the pre- and post-baseline periods respectively, and made cross-year and cross-period comparison of these rates with repeated measures analysis methods.Results: The embolization cohort (N = 4280) and the nephrectomy cohort (N = 3842) had mean baseline ages of 50.7 and 51.7 years with 52.5% and 51.3% males, respectively. After the intervention, the embolization cohort had statistically significant reductions (all p < .05) in gross hematuria (-27.7%), retroperitoneal hemorrhage (-8.4%), and abdominal mass (-6.9%), and increases in hypertension (15.5%), renal mass or unspecified disorder of kidney and ureter (13.8%), anemia (5.1%), and renal insufficiency (3.3%). Similarly, the nephrectomy cohort saw statistically significant reductions (all p < .05) in gross hematuria (-30.6%), flank pain (-7.5%), and abdominal mass (-6.4%), but increases in hypertension (11.9%), renal insufficiency (10.4%), and anemia (7.6%). Embolization was associated with post-procedure increases in renal mass or unspecified kidney/ureter disorder (13.9%), other disorders of kidney and ureter (3.4%), non-acute renal insufficiency (3.1%), flank pain (3.7%), renal insufficiency (3.2%), etc. (all p < .05). Nephrectomy was associated with post-procedure increases in postoperative ileus (5.3%), pain and headache (4.8%), paralytic ileus (3.6%), etc. (all p < .05).Conclusions: Both embolization and nephrectomy were effective, but associated with increases in certain angiomyolipoma-related conditions. Further, the embolization effect on gross hematuria, retroperitoneal hemorrhage, and abdominal mass might subside after the intervention year. [ABSTRACT FROM AUTHOR]

Conventionally, xanthogranulomatous pyelonephritis is treated with antibiotics and drainage of abscess followed by nephrectomy for definitive treatment. Surgical excision of the affected kidney carries risk of significant complications. An alternative treatment modality is described in the form of embolization of the renal artery to devascularise the renal parenchyma and ablate the renal tissue, thus avoiding a major surgical procedure and the significant risks involved. [ABSTRACT FROM AUTHOR]

Purpose: To describe the incidence of multiple renal artery pseudoaneurysms (PSA) in patients referred for renal artery embolization following partial nephrectomy and to study its relationship to RENAL nephrometry scores.Materials and Methods: The medical records of 25 patients referred for renal artery embolization after partial nephrectomy were retrospectively reviewed for the following parameters: size and number of tumors, RENAL nephrometry scores, angiographic abnormalities, technical and clinical outcomes, and estimated glomerular filtration rates (eGFRs) after embolization.Results: Twenty-four patients had primary renal tumors, while 1 patient had a pancreatic tumor invading the kidney. Multiple tumors were resected in 4 patients. Most patients (92 %) were symptomatic, presenting with gross hematuria, flank pain, or both. Angiography revealed PSA with (n = 5) or without (n = 20) AV fistulae. Sixteen patients (64 %) had multiple PSA involving multiple renal vessels. Higher RENAL nephrometry scores were associated with an increasing likelihood of multiple PSA. Multiple vessels were embolized in 14 patients (56 %). Clinical success was achieved after one (n = 22) or two (n = 3) embolization sessions in all patients. Post-embolization eGFR values at different time points after embolization were not significantly different from the post-operative eGFR.Conclusion: A majority of patients requiring renal artery embolization following partial nephrectomy have multiple pseudoaneurysms, often requiring selective embolization of multiple vessels. Higher RENAL nephrometry score is associated with an increasing likelihood of multiple pseudoaneurysms. We found transarterial embolization to be a safe and effective treatment option with no long-term adverse effect on renal function in all but one patient with a solitary kidney. [ABSTRACT FROM AUTHOR]

Higher turnaround of urologic patients in the tertiary clinical center can lead to more accompanying complications, ranging from 1% to 55% for various procedures, with the incidence of vascular injuries varying from 0.43% up to 9.5%. In patients with impaired renal function, it is imperative to prevent the loss of normal kidney function and potential hemodialysis. Being minimally invasive, endovascular procedures such as renal artery embolization (RAE) can treat major and life-threatening complications, but good and prompt communication between urologists and interventional radiologist is necessary for fast and effective treatment. Absolute contraindications for RAE are the presence of acute infection and previously known anaphylactic reaction to the iodine contrast media, while previous mild or moderate allergic reactions to iodine contrast media are not contraindications for RAE. Currently used embolic agents can be divided into temporary and permanent embolization agents. While the temporary embolization agent available is a gelatin sponge that could be used as complementary material or stand-alone, for permanent embolization interventional radiologists use microparticles, microspheres, liquid embolic agents, coils, and microcoils. RAE procedures are considered to be safe with a low incidence of complications, with non-target embolization being the most serious one. Postembolization syndrome is considered to be the most common adverse effect and it involves around 90% of patients. The overall results show that RAE is a safe, minimally invasive procedure that can effectively treat significant complications caused by other urologic procedures, with the reported success rates of 87%-100%., (Sestre Milosrdnice University Hospital.)