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Ureter obstruction

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https://www.readbyqxmd.com/read/29137105/urgent-laparoscopic-ureterolithotomy-for-proximal-ureter-stones-accompanied-with-obstructive-pyelonephritis-is-it-safe-and-effective-without-preoperative-drainage
#1
Huan Yang, Xiao Yu, Ejun Peng, Cong Li, Lei Cui, Xing Zeng, Shen Wang, Chao Wei, Zhihua Wang, Xiaolin Guo, Zhiqiang Chen, Zhangqun Ye, Shaogang Wang, Chenming Zhao
To evaluate the safety and efficacy of retroperitoneal laparoscopic ureterolithotomy (RLU) in the treatment of proximal ureteral stones accompanied with obstructive pyelonephritis without preoperative drainage.We retrospectively reviewed 21 cases of proximal ureteral stones with infected kidney undergoing RLU between July 2013 and September 2016. Stone-induced obstructive infected hydronephrosis was diagnosed using blood and urine tests and imaging modalities. Empirical effective broad spectrum antibiotic therapy was initiated immediately, and then urgent RLU was performed without preoperative drainage...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29135146/-laparoscopic-heminephrureterectomy-for-duplex-kidney-in-children
#2
I M Kagantsov, V V Sizonov, V I Dubrov, S G Bon-Darenko, N R Akramov, O S Shmyrov, G I Kuzovleva, N V Markov, D E Sablin, R V Surov, A V Pirogov, A A Logval
INTRODUCTION: Duplication of the upper urinary tract is one of the most common congenital urological anomalies. In patients with critically decreased or lost function of one of the renal segments, heminephrureterectomy is usually the treatment of choice. Until recently, this was an open surgery; in cases of complete removal of the ureter, an additional incision in the iliac region was required. Currently, heminephrureterectomy is increasingly performed laparoscopically. We report the experience in laparoscopic heminephrureterectomy (LHNUE) in 10 clinics in Russia and Belarus...
October 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/29131764/nongynecologic-findings-seen-at-pelvic-us
#3
Akram M Shaaban, Maryam Rezvani, Jeffrey D Olpin, Anne M Kennedy, Ayman H Gaballah, Bryan R Foster, Christine O Menias, Khaled M Elsayes
Ultrasonography (US) is frequently the first imaging modality used to examine women with symptoms involving the pelvis. It is widely available and involves no exposure to ionizing radiation. Images can be acquired with a transabdominal, endovaginal, or translabial approach, and the use of video clips and three-dimensional reconstructions can be helpful. US is excellent for assessment of the uterus, ovaries, and adnexa. Occasionally, nongynecologic pelvic diseases arising from the gastrointestinal, genitourinary, and musculoskeletal systems and the pelvic peritoneal and extraperitoneal spaces may be detected and can be a source of diagnostic dilemma...
November 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29130537/evaluation-of-renal-metabolic-response-to-partial-ureteral-obstruction-with-hyperpolarized-13-c-mri
#4
David J Niles, Jeremy W Gordon, Gengwen Huang, Shannon Reese, Erin B Adamson, Arjang Djamali, Sean B Fain
Hyperpolarized (13) C magnetic resonance imaging (MRI) may be used to non-invasively image the transport and chemical conversion of (13) C-labeled compounds in vivo. In this study, we utilize hyperpolarized (13) C MRI to evaluate metabolic markers in the kidneys longitudinally in a mouse model of partial unilateral ureteral obstruction (pUUO). Partial obstruction was surgically induced in the left ureter of nine adult mice, leaving the right ureter as a control. (1) H and hyperpolarized [1-(13) C]pyruvate MRI of the kidneys was performed 2 days prior to surgery (baseline) and at 3, 7 and 14 days post-surgery...
November 12, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/29123001/effective-remedy-for-encapsulating-peritoneal-sclerosis-with-ureteroileal-fistula
#5
Masataka Banshodani, Hideki Kawanishi, Sadanori Shintaku, Masahiro Yamashita, Misaki Moriishi, Shinichiro Tsuchiya
Encapsulating peritoneal sclerosis (EPS), treated with surgical enterolysis as a final option, may become refractory to surgical intervention due to intraperitoneal complications. We report the case of a 59-year-old man presenting with EPS who underwent enterolysis at the age of 50, following 15 years of peritoneal dialysis (PD) and peritonitis. During the patient's first surgery, complete surgical enterolysis could not be performed due to severe intestinal adhesions with a deteriorated/calcified small bowel...
November 2017: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/29118532/transperitoneal-laparoscopic-repair-of-retrocaval-ureter-our-experience-and-review-of-literature
#6
Ashwin S Tamhankar, Abhishek J Savalia, Ajit S Sawant, Prakash W Pawar, Gaurav V Kasat, Sunil R Patil
Context and Aim: Retrocaval ureter (RCU), also known as circumcaval ureter, occurs due to anomalous development of inferior vena cava (IVC) and not ureter. The surgical approach for this entity has shifted from open to laparoscopic and robotic surgery. This is a relatively new line of management with very few case reports. Herein, we describe the etiopathology, our experience with six cases of transperitoneal laparoscopic repair of RCU operated at tertiary care center in India and have reviewed different management options...
October 2017: Urology Annals
https://www.readbyqxmd.com/read/29109726/il-36%C3%AE-regulates-tubulointerstitial-inflammation-in-the-mouse-kidney
#7
Osamu Ichii, Junpei Kimura, Tadashi Okamura, Taro Horino, Teppei Nakamura, Hayato Sasaki, Yaser Hosny Ali Elewa, Yasuhiro Kon
IL-36α, a member of the IL-1 family, is a crucial mediator of inflammatory responses. We previously found that IL-36α was overexpressed in injured distal tubules (DTs); however, its pathological function remains unclear. Herein, unilateral ureter obstruction (UUO) or folic acid (FA) injection was performed in mouse kidneys to assess the role of IL-36α in kidney injury. IL-36α mRNA and protein expression significantly increased in the kidneys within 24 h after UUO. IL-36α localized to dilated DTs. IL-36α expression significantly correlated with the progression of tubulointerstitial cell infiltration and tubular epithelium cell death in UUO kidneys and with renal dysfunction in FA-induced acute kidney injury mice...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29109083/activated-hedgehog-gli-signaling-causes-congenital-ureteropelvic-junction-obstruction
#8
Sepideh Sheybani-Deloui, Lijun Chi, Marian V Staite, Jason E Cain, Brain J Nieman, R Mark Henkelman, Brandon J Wainwright, S Steven Potter, Darius J Bagli, Armando J Lorenzo, Norman D Rosenblum
Intrinsic ureteropelvic junction obstruction is the most common cause of congenital hydronephrosis, yet the underlying pathogenesis is undefined. Hedgehog proteins control morphogenesis by promoting GLI-dependent transcriptional activation and inhibiting the formation of the GLI3 transcriptional repressor. Hedgehog regulates differentiation and proliferation of ureteric smooth muscle progenitor cells during murine kidney-ureter development. Histopathologic findings of smooth muscle cell hypertrophy and stroma-like cells, consistently observed in obstructing tissue at the time of surgical correction, suggest that Hedgehog signaling is abnormally regulated during the genesis of congenital intrinsic ureteropelvic junction obstruction...
November 6, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29098196/perirenal-abscess-after-partial-nephrectomy-because-of-migration-of-upper-calix-stone-and-urine-leakage-a-case-report
#9
Sheng-Chun Hung, Li-Wen Chang, Cheng-Kuang Yang
Background: Nephron-sparing surgery has been shown to achieve oncological results equivalent to those of radical nephrectomy in patients with compromised renal function who have renal tumors <4 cm. However, technical difficulties and potential surgical complications remain challenges to the surgeon. Various factors, such as tumor size and location, collecting system invasion, and patient's expectations, are major concerns that may affect the feasibility of performing an effective partial nephrectomy. We report a patient with renal cell carcinoma who underwent open partial nephrectomy and suffered from complications of perirenal abscess because of stone migration, obstruction, and subsequence urine leakage...
2017: Journal of Endourology Case Reports
https://www.readbyqxmd.com/read/29082329/a-rare-case-report-of-hydronephrosis-and-acute-kidney-injury-secondary-to-gonadal-vein-thrombosis-in-a-young-male
#10
Jason M Sandberg, Raymond B Dyer, Majid Mirzazadeh
Background: Gonadal vein thrombosis (GVT) has been reported in association with malignancy and pelvic inflammatory conditions. Patients who develop GVT often require systemic anticoagulation to reduce the risk of pulmonary embolism and other local and distant thromboembolic effects. As the gonadal vein courses from the pelvis toward its outlet in the upper abdomen, its intimate relationship to the ureter in the setting of vascular pathology may pose a risk for urinary obstruction in the adult. We are reporting a rare case of GVT leading to ureteral obstruction and acute kidney injury (AKI) in a young otherwise healthy male and provide a review of similar literature...
2017: Journal of Endourology Case Reports
https://www.readbyqxmd.com/read/29082328/schistosomiasis-a-disobedient-ureter-a-disobedient-diagnosis
#11
Pallavi Olivia Pal, Richard Daron Smith, Sian Allen, Marzena Ratynska, Simon Edwards, Philip Gothard, Sarah Logan
Background: Schistosomiasis is rare in western countries, but remains a potentially serious disease. It is known to result in severe urogenital complications; prompt diagnosis can therefore significantly affect outcomes. Case Presentation: We report the case of a 41-year-old male with pleuritic chest pain and visible hematuria who had emigrated from Zimbabwe to the United Kingdom 20 years previously. CT imaging revealed a hydronephrotic right pelvicaliceal system, with a dilated ureter to its distal portion...
2017: Journal of Endourology Case Reports
https://www.readbyqxmd.com/read/29080255/how-to-stent-the-ureter-after-kidney-transplantation-in-children-a-comparison-of-two-methods-of-urinary-drainage
#12
Anuradha S Ter Haar, Rulan S Parekh, Ralph W J Leunissen, Joop van den, Armando J Lorenzo, Diane Hebert, Mandy G Keijzer-Veen, Karlien Cransberg
Ureteral stenting after pediatric renal transplantation serves to prevent obstruction and urinary leakage, but can also cause complications. This study compares the complication rates of both methods. Data were retrospectively collected at Erasmus MC, Rotterdam, the Netherlands (splint group, n = 61) and Hospital for Sick Children, Toronto, Canada (JJ catheter group, n = 50). Outcome measures included urological interventions and incidence of UTIs during the first 3 months post-transplantation. The splint was removed after a median of 9 (IQR 8-12), the JJ catheter after 42 (IQR 36-50) days...
October 27, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/29075296/xanthogranulomatous-pyelonephritis-with-incomplete-double-ureter
#13
Yutaro Hayashi, Takashi Kawahara, Yusuke Hattori, Kota Shimokihara, Sohgo Tsutsumi, Daiji Takamoto, Taku Mochizuki, Jun-Ichi Teranishi, Yasushi Yumura, Yasuhide Miyoshi, Masako Otani, Hiroji Uemura
INTRODUCTION: Xanthogranulomatous pyelonephritis (XGP) is a type of chronic renal inflammation that usually occurs in immunocompromised middle-aged women with chronic urinary tract infection or ureteral obstruction induced by the formation of ureteral stones. XGP with an incomplete double ureter is extremely rare. CASE PRESENTATION: A 76-year-old woman was referred to our department to undergo further examination for a left renal tumor that was detected by ultrasonography...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/29069033/postrenal-acute-kidney-injury-in-a-patient-with-unilateral-ureteral-obstruction-caused-by-urolithiasis-a-case-report
#14
Itsuro Kazama, Toshiyuki Nakajima
RATIONALE: In patients with bilateral ureteral obstruction, the serum creatinine levels are often elevated, sometimes causing postrenal acute kidney injury (AKI). In contrast, those with unilateral ureteral obstruction present normal serum creatinine levels, as long as their contralateral kidneys are preserved intact. However, the unilateral obstruction of the ureter could affect the renal function, as it humorally influences the renal hemodynamics. PATIENT CONCERNS: A 66-year-old man with a past medical history of hypertension and diabetes mellitus came to our outpatient clinic because of right abdominal dullness...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29068584/hydronephrosis-in-the-course-of-ureteropelvic-junction-obstruction-an-underestimated-problem-current-opinions-on-the-pathogenesis-diagnosis-and-treatment
#15
REVIEW
Wojciech Krajewski, Joanna Wojciechowska, Janusz Dembowski, Romuald Zdrojowy, Tomasz Szydełko
Ureteropelvic junction obstruction (UPJO) causes a reduction in the urine flow from the renal pelvis into the ureter. Untreated UPJO may cause hydronephrosis, chronic infection or urolithiasis and will often result in progressive deterioration of renal function. Most cases of UPJO are congenital; however, the disease can be clinically silent until adulthood. Other causes, both intrinsic and extrinsic, are acquired and include urolithiasis, post-operative/inflammatory/ischemic stricture, fibroepithelial polyps, adhesions and malignancy...
August 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29063068/immunoglobulin-g4-related-kidney-disease-pathogenesis-diagnosis-and-treatment
#16
REVIEW
Ke Zheng, Fei Teng, Xue-Mei Li
Immunoglobulin G4-related disease (IgG4-RD) is a recently recognized clinical entity that often involves multiple organs; it is characterized by high levels of serum immunoglobulin G4 (IgG4), dense infiltration of IgG4+ cells, and storiform fibrosis. Cellular immunity, particularly T cell-mediated immunity, has been implicated in the pathogenesis of IgG4-RD. The most frequent renal manifestations of IgG4-RD are IgG4-related tubulointerstitial nephritis, membranous glomerulonephropathy (MGN), and obstructive nephropathy secondary to urinary tract obstruction due to IgG4-related retroperitoneal fibrosis, prostatitis, or ureter inflammation...
September 2017: Chronic Dis Transl Med
https://www.readbyqxmd.com/read/29053674/assessing-urinary-tract-junction-obstruction-defects-by-methylene-blue-dye-injection
#17
Kangsun Yun
Urinary tract junction obstruction defects are congenital anomalies inducing hydronephrosis and hydroureter. Murine urinary tract junction obstruction defects can be assessed by tracking methylene blue dye flow within the urinary system. Methylene blue dye is injected into the renal pelvis of perinatal embryonic kidneys and dye flow is monitored from the renal pelvis of the kidney through the ureter and into the bladder lumen after applying hydrostatic pressure. Dye accumulation will be evident in the bladder lumen of the normal perinatal urinary tract, but will be constrained between the renal pelvis and the end point of an abnormal ureter, if urinary tract obstructions occur...
October 12, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29038191/obstructive-uropathy-as-initial-presentation-of-genitourinary-tuberculosis-and-masquerading-as-a-postsurgical-complication
#18
Grace Igiraneza, Theobald Hategekimana, Olivier M Manzi, Onyema Ogbuagu
A 46-year-old woman who had a recent total abdominal hysterectomy presented with a 1 month history of lower abdominal pain, 1 week of nausea and vomiting as well as decreased urinary output preceded by a year of significant unintentional weight loss. On renal imaging, she was found to have bilateral hydronephrosis and hydroureters in the setting of bilateral distal ureteric obstruction complicated with acute kidney injury and severe hyperkalaemia requiring haemodialysis. The initial concern was for ureteric injury, a known complication of abdominal hysterectomy procedures, however, a urological intervention, performed 9 months later to relieve the ureteric obstruction, revealed purulent material within the left ureter that was smear positive for acid fast bacilli...
October 15, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29028084/expression-and-clinical-significance-of-aquaporin-1-and-et-1-in-urine-of-children-with-congenital-hydronephrosis
#19
Y Yu, Y-F Kang, K-S Li, Z-H Chen, L Zhang, H-M Zhang, M Zhang
OBJECTIVE: Congenital hydronephrosis is induced by congenital obstruction of uretero pelvic junction, bladder vesicoureteral reflux, posterior urethral valve, stricture of ureter end and ureterocyst, which is extremely apt to cause end-stage renal failure in children. It becomes significant to explore the expression profile and clinical significance of aquaporin-1 (AQP-1) and ET-1 (endothelin-1) in the urine of children with congenital hydronephrosis. PATIENTS AND METHODS: 80 cases of children with congenital hydronephrosis were selected to be the observation group and another 40 cases of children with other diseases were served as control group...
September 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29024711/fluoride-potentiates-tubulointerstitial-nephropathy-caused-by-unilateral-ureteral-obstruction
#20
Takamasa Kido, Masashi Tsunoda, Chiemi Sugaya, Hiroshi Hano, Hiroyuki Yanagisawa
The contamination of ground water by fluoride has been reported worldwide. Most fluoride (approximately 70%) is filtered by the kidneys; humans or experimental animals with renal damage therefore may be more affected by fluoride exposure than those with normal kidney function. Tubulointerstitial fibrosis, which involves macrophage-promoted extracellular matrix production and myofibroblast migration, can be induced in rats by unilateral ureteral obstruction (UUO). We examined the effects of fluoride exposure on tubulointerstitial fibrosis in the obstructed kidney of UUO rats...
October 9, 2017: Toxicology
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