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Ureter obstruction

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https://www.readbyqxmd.com/read/29343922/periureteral-inferior-vena-caval-venous-ring-presenting-as-urinary-obstruction
#1
Suprava Naik, Arashdeep Singh, Sudipta Mohakud, Nerbadyswari Deep
The embryological development of the inferior vena cava (IVC) is complex, and thus the vena cava may undergo a large number of congenital anomalies. Periureteric venous ring is a rare developmental anomaly of IVC where the right ureter passes through a slit-like opening in a partially duplicated infrarenal IVC, resulting in dilatation of upper urinary tract. Split-bolus multidetector computed tomography technique is useful in detecting such vascular anomaly causing ureteric obstruction as it can clearly show the vascular and ureteric phase in a single acquisition...
January 2018: Indian Journal of Urology: IJU: Journal of the Urological Society of India
https://www.readbyqxmd.com/read/29343921/ureteropelvic-junction-obstruction-mimicking-an-elephant-head-on-magnetic-resonance-imaging
#2
Sony Bhaskar Mehta, Hariharan Krishnamoorthy, Biju Pillai
Ureteropelvic junction obstruction (UPJO) with giant hydronephrosis is relatively rare in adults as compared to children. Most of the UPJO reported or seen in daily practice have a distinct hydronephrosis with a narrow ureteropelvic junction and a collapsed ureter distally. We present images a case of an adult female with Left UPJO, which on MRI mimicked an 'elephant head'.
January 2018: Indian Journal of Urology: IJU: Journal of the Urological Society of India
https://www.readbyqxmd.com/read/29324920/technetium-99m-dimercaptosuccinic-acid-renal-scintigraphy-can-guide-clinical-management-in-congenital-hydronephrosis
#3
Biljana Bazić-Đorović, Marija Radulović, Marija Šišić, Ljiljana Jauković, Sanja Dugonjić, Dragan Pucar, Zoran Janković, Slobodanka Beatović, Milica Janković, Zoran Krstić, Boris Ajdinović
OBJECTIVE: The purpose of this study was to evaluate damage of the kidney with technetium-99m-dimercaptosuccinic acid (99mTc-DMSA) scintigraphy in children with congenital hydronephrosis (CH) and the influence of other postnatal associated diagnoses on abnormal 99mTc-DMSA findings. SUBJECTS AND METHODS: 99mTc-DMSA scintigraphy in 54 children (17 girls and 37 boys), aged from 2 months to 5 years (median 11 months) with 66 congenital hydronephrotic renal units (RU) (42 unilateral hydronephrosis-29 boys and 13 girls; 12 bilateral hydronephrosis-8 boys and 4 girls) was performed...
September 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29306855/ureteral-intramural-metastatic-deposit-of-prostate-cancer-with-ureteric-obstruction
#4
Claire Pascoe, Todd G Manning, David Wetherell, Nathan Lawrentschuk
True metastatic ureteric lesions are exceptionally rare when sourced from any primary tumour. Primary prostatic cancer metastasis to the ureter is understandably even more atypical with very few cases reported in current literature. True intramural ureteric metastatic disease deposited from prostate cancer is an even rarer occurrence. We present a case of a man in his mid-60s with left-sided hydronephrosis in the setting of biochemical recurrence of Gleason 9 prostate cancer. Initially misdiagnosed as obstruction secondary to mass effect from a large trigonal lesion, subsequent investigation revealed solid intramural metastatic deposit of prostate primary tumour in the distal ureter...
January 6, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29302903/pelvi-ureteric-junction-obstruction-related-to-crossing-vessels-vascular-anatomic-variations-and-implication-for-surgical-approaches
#5
REVIEW
Frédéric Panthier, Fabien Lareyre, Marie Audouin, Juliette Raffort
Pelvi-ureteric junction obstruction corresponds to an impairment of urinary transport that can lead to renal dysfunction if not treated. Several mechanisms can cause the obstruction of the ureter including intrinsic factors or extrinsic factors such as the presence of crossing vessels. The treatment of the disease relies on surgical approaches, pyeloplasty being the standard reference. The technique consists in removing the pathologic ureteric segment and renal pelvis and transposing associated crossing vessels if present...
January 4, 2018: International Urology and Nephrology
https://www.readbyqxmd.com/read/29244609/outcomes-in-dogs-with-uroabdomen-43-cases-2006-2015
#6
Janet A Grimes, Jon M Fletcher, Chad W Schmiedt
OBJECTIVE To determine the rate of and factors associated with survival to hospital discharge in dogs with uroabdomen. DESIGN Retrospective case series. ANIMALS 43 dogs with uroabdomen confirmed at 2 veterinary teaching hospitals from 2006 through 2015. PROCEDURES Medical records were reviewed and data extracted regarding cause and location of urinary tract rupture, serum creatinine concentration and other variables at hospital admission, and outcomes. Variables were tested for associations with survival to hospital discharge...
January 1, 2018: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/29244271/laparoscopic-dismembered-pyeloplasty-combined-with-port-entrance-flexible-renoscopic-lithotripsy
#7
Kaan Gokcen, Gokhan Gokce, Gokce Dundar, Resul Cicek, Halil Gulbahar, Emin Yener Gultekin
INTRODUCTION: Ureteropelvic junction obstruction and concomitant calculus disease may coexist. We demonstrate our use of flexible renoscopy during laparoscopic pyeloplasty for caliceal stone removal. PATIENT AND METHODS: A 28-year-old female patient presented with recurrent attacks of flank pain of two years duration. When noncontrast-CT and DTPA were performed, the patient was diagnosed with ureteropelvic junction stenosis and 3 stones with a total burden of 14mm in the lower pole of right kidney...
December 18, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/29242399/novel-functional-renal-imaging-with-18f-fds-pet-in-rat-models-of-kidney-diseases
#8
Rudolf Werner, Hiroshi Wakabayashi, Xinyu Chen, Mitsuru Hirano, Tetsuya Shinaji, Constantin Lapa, Steven P Rowe, Mehrbod S Javadi, Takahiro Higuchi
Background: Precise regional quantitative assessment of renal function is limited with conventional 99mTc-labeled renal radiotracers. A recent study reported that the positron emission tomography (PET) radiotracer 2-deoxy-2-18F-fluorosorbitol (18F-FDS) has ideal pharmacokinetics for functional renal imaging. Furthermore, 18F-FDS is available via simple reduction from routinely used 2-deoxy-2-18F-fluoro-D-glucose (18F-FDG). We aimed to further investigate the potential of 18F-FDS PET as a functional renal imaging agent using rat models of kidney diseases...
December 14, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29239749/robotic-ureteral-reconstruction-using-buccal-mucosa-grafts-a-multi-institutional-experience
#9
Lee C Zhao, Aaron C Weinberg, Ziho Lee, Mark J Ferretti, Harry P Koo, Michael J Metro, Daniel D Eun, Michael D Stifelman
BACKGROUND: Minimally invasive treatment of long, multifocal ureteral strictures or failed pyeloplasty is challenging. Robot-assisted buccal mucosa graft ureteroplasty (RBU) is a technique for ureteral reconstruction that avoids the morbidity of bowel interposition or autotransplantation. OBJECTIVE: To evaluate outcomes for RBU in a multi-institutional cohort of patients treated for revision ureteropelvic junction obstruction and long or multifocal ureteral stricture at three tertiary referral centers...
November 24, 2017: European Urology
https://www.readbyqxmd.com/read/29234529/the-effectiveness-of-ureteric-metal-stents-in-malignant-ureteric-obstructions-a-systematic-review
#10
REVIEW
Panagiotis Kallidonis, Dimitrios Kotsiris, Francesco Sanguedolce, Panteleimon Ntasiotis, Evangelos Liatsikos, Athanasios Papatsoris
Objective: To review the literature on the effectiveness, safety and long-term patency of ureteric metal mesh stents (MSs), as a variety of MSs have been used for managing malignant ureteric obstruction over the last three decades. Materials and methods: A systematic review using the search string; Ureter∗ AND (stent OR endoprosthesis) AND metal∗ was conducted on PubMed, Scopus, Web of science and Cochrane Library online databases in May 2016. Prospective, retrospective, and comparative studies including MSs were included...
December 2017: Arab Journal of Urology
https://www.readbyqxmd.com/read/29230844/cyclophilin-d-promotes-tubular-cell-damage-and-the-development-of-interstitial-fibrosis-in-the-obstructed-kidney
#11
Weiping Hou, Khai G Leong, Elyce Ozols, Greg H Tesch, David J Nikolic-Paterson, Frank Y Ma
Cyclophilin D (CypD) is an important component in mitochondrial-dependent tubular cell death in acute kidney injury. However, it is not known whether CypD contributes to tubular cell damage in chronic interstitial fibrosis. We investigated this question in the unilateral ureter obstruction (UUO) model of renal interstitial fibrosis. Groups of CypD-/- and wild type (WT) mice were killed 7 or 12 days after UUO surgery. The significant tubular cell apoptosis seen in WT UUO was significantly reduced in CypD-/- UUO based on TUNEL and cleaved caspase 3 staining...
December 12, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29229357/obstructive-uropathy-in-a-patient-with-double-district-ureter
#12
Diana Miguel Mesa, Ángela de la Hoz Rodríguez, Jose María Lopesino González, Jose Luis Muñoz de Nova
No abstract text is available yet for this article.
December 8, 2017: Cirugía Española
https://www.readbyqxmd.com/read/29222673/ureteric-entrapment-in-sacroiliac-joint-causing-hydroureter-and-ipsilateral-kidney-hypertrophy
#13
Yurie Otsuru, Chuichi Kondo, Shohei Hara, Hideo Takahashi, Kenjiro Matsuno
A unilateral megaureter was found in an elderly female cadaver during routine dissection. The left proximal ureter, which was thick and convolute, descended and entered into the pelvic cavity, where the distal ureter was attached to the posterior pelvic wall at the inlet level. Removal of connective tissue surrounding the attached region revealed ureteric entrapment in the sacroiliac joint. The ipsilateral kidney, from which the megaureter originated, showed no pelvicalyceal dilatation. In contrast, the left kidney was enlarged, weighing 24% more than the right kidney...
December 8, 2017: Anatomical Science International
https://www.readbyqxmd.com/read/29217322/incidence-of-ureterovesical-obstruction-and-cohen-antireflux-surgery-after-deflux%C3%A2-treatment-for-vesicoureteric-reflux
#14
Manabu Okawada, Hiroshi Murakami, Nana Tanaka, Yuki Ogasawara, Geoffrey J Lane, Tadaharu Okazaki, Toshihiro Yanai, Masahiko Urao, Atsuyuki Yamataka
AIM: The purpose of this study was to determine the incidence of ureteric obstruction (UB) and requirement for Cohen antireflux surgery (CAS) after DefluxⓇ treatment (DT) for vesicoureteric reflux (VUR). METHODS: Between 2011 and 2017, 494 ureters (VUR severity ≤ grade III: N=291 or >grade IV: N=203) were treated by DT at a mean age of 4.5 (range: 0.2-24) years. Epidural Catheter Assistance (ECA) was used to exclude UB by injecting diluted indigo carmine solution (1-3mL) into an epidural catheter inserted into a ureter after DT and confirming dye flow within 15min...
November 14, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/29204362/incarcerated-prolapsed-ureterocele-after-midurethral-sling-in-women
#15
Patkawat Ramart
Stress urinary incontinence (SUI) is a common problem in women. Successful treatment is now mid urethral sling but it would be a cause of urethral obstruction. In this case report, a 50 years old woman presented with a huge introitus mass after 3 months of midurethral sling. The mass protruded from the urethra and could not be reduced. Emergency MRI of pelvis was demonstrated prolapsed ureterocele, single system of right ureter. Preoperative planning was cystoscopy and mass excision. The patient was preoperatively counseled that right ureteric reimplantation may be required...
January 2018: Urology Case Reports
https://www.readbyqxmd.com/read/29201517/long-term-outcome-of-laparoscopic-vesicouterine-fistula-repair-experience-from-a-tertiary-referral-centre
#16
Bimalesh Purkait, Seema Mehrotra, Rahul Janak Sinha, Ved Bhaskar, Vishwajeet Singh
Objective: Vesicouterine fistula (VUF) is an uncommon cause of female genito-urinary fistula. Most of these fistulas are due to lower segment uterine cesarean section (LSCS). Traditionally, open surgical repair has been the traditional treatment. However, laparoscopic repair of VUF is a minimally invasive technique and few case reports have been published with short term follow up. In the present study, we are presenting our long- term outcome of laparoscopic repair of VUF. Material and methods: A retrospective analysis of 8 patients with VUF was performed from 2010 to 2015...
December 2017: Turkish Journal of Urology
https://www.readbyqxmd.com/read/29194771/outcomes-of-indwelling-metallic-stents-for-malignant-extrinsic-ureteral-obstruction
#17
Jumpei Asakawa, Taro Iguchi, Satoshi Tamada, Noriko Ninomiya, Minoru Kato, Takeshi Yamasaki, Tatsuya Nakatani
OBJECTIVES: To report the treatment outcomes of patients with extrinsic ureteral obstruction treated with metallic stents and to identify the factors predicting stent failure. METHODS: A total of 52 patients with extrinsic ureteral obstruction as a result of malignancy (66 ureters) were treated with metallic stents (Resonance® ) and included in the study. The median observation period was 118 days. RESULTS: The median survival time of these patients was 210 days, and the stent patency rate was 86...
November 30, 2017: International Journal of Urology: Official Journal of the Japanese Urological Association
https://www.readbyqxmd.com/read/29187373/klotho-activin-a-in-kidney-injury-plasma-klotho-is-maintained-in-unilateral-obstruction-despite-no-upregulation-of-klotho-biosynthesis-in-contralateral-kidney
#18
Anders Nordholm, Maria L Mace, Eva Gravesen, Jacob Hofman-Bang, Marya Morevati, Klaus Olgaard, Ewa Lewin
In a new paradigm of etiology related to Chronic Kidney Disease-Mineral and Bone Disorder (CKD-MBD) kidney injury may cause induction of factors in the injured kidney that are released into the circulation and thereby initiate and maintain renal fibrosis and CKD-MBD. Klotho is believed to ameliorate renal fibrosis and CKD-MBD, while ActivinA might have detrimental effects. The unilateral ureter obstruction (UUO) model is used here to examine this concept by investigating early changes related to renal fibrosis in obstructed kidney, untouched contralateral kidney and vasculature, which might be affected by secreted factors from the obstructed kidney, and compared to unilateral nephrectomized controls (UNX)...
November 29, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29180072/functional-outcome-of-completely-intracorporeal-robotic-ileal-ureteric-replacement
#19
B Ubrig, J Janusonis, L Paulics, A Boy, M Heiland, A Roosen
OBJECTIVE: To assess perioperative, clinical, and functional outcomes following completely robotic ileal ureter. METHODS: We retrospectively reviewed 7 consecutive patients undergoing completely intracorporeal ileal ureteric replacement between November 2015 and May 2017. One patient had a solitary kidney. A 4-arm technique was used. In 5 patients, additional psoas hitch procedure was performed. Patients had retrograde filling and removal of the ileal stent and transurethral catheter at an average of 14 days postoperatively...
November 26, 2017: Urology
https://www.readbyqxmd.com/read/29172872/ultrasonography-in-the-diagnosis-and-management-of-cats-with-ureteral-obstruction
#20
Christopher R Lamb, Stefano Cortellini, Zoe Halfacree
Objectives The objective was to identify clinical or ultrasonographic results associated with ureteral obstruction or outcome in cats with azotaemia. Methods This was a retrospective cross-sectional study of cats with azotaemia (serum creatinine >180 μmol/l) that had ultrasonography of the urinary tract, ultrasound images available for review and received treatment for azotaemia. Cats with pre-renal azotaemia or urethral obstruction were excluded. Associations between clinical and ultrasonographic results and the dependent variables 'tentative diagnosis of ureteral obstruction', 'pyelography positive for ureteral obstruction' and 'death in hospital' were tested using binary logistic regression...
February 1, 2017: Journal of Feline Medicine and Surgery
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