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Query: UMLS:C0403608 (ureter)
 9,655 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Over an 8 year period, the antenatal diagnosis of uropathy was made in 125 fetuses, but confirmed in only 22%; in the other cases, it was inadequate (50%) or wrong (28%). It was only in a few cases that surgery was any use in the first days of life (sectioning urethral valves, and temporary nephrostomy); in most cases, surgery was carried out between 1 and 3 months of age: total or partial nephrectomy (mainly for multicystic dysplasia and ureteral duplication with a ureterocele or ectopia), and usually conservative surgery (resection of the pyelo-ureteral junction, uretero-vesical implantation because of reflux or mega-ureter). The long-term results depend upon the degree of renal dysplasia: the prognosis was good in all cases of hydronephrosis that were operated on, but it is often poor when uropathies are characterized by early obstructive phenomena in intra-uterine life as occurs with urethral valves. In those cases, renal insufficiency cannot always be prevented by neonatal surgery.
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PMID:[Management and treatment of uropathies detected in utero. Evaluation of 8 years' experience]. 268 5

The authors describe a new endourological procedure for resolving cases of stenosis of the impassable ureteropyelic union. The procedure consists in raising the pyeloureteral union by means of a Chevassu's catheter equipped with its wire guide, introduced backwards into the ureter and which, when pushed externally, situates the ureteropyelic union by way of intrapyelic ureterocele. We then proceed to the lengthwise cutting of this ureterocele under nephroscopic view until the ureteral catheter is exposed. With this procedure a successful solution is provided for those cases that were debarred from endourological surgery because the tutor catheter was unable to pass.
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PMID:[Endoureteropyelotomy in impassable stenosis of the pyeloureteral junction: instrumental conversion of the stenosis into an intrapelvic ureterocele]. 272 39

An analysis of 43 clinical observations helped to establish three variants of ectopic ureterocele: ectopic ureterocele of the accessory ureter, ectopic ureterocele of the doubled ureter. Ectopic ureterocele always brings about obstruction of the ureter. Ectopic ureterocele of the accessory ureter was treated by making anastomosis between the accessory ureter and the main ureter with a removal of all the accessory ureter and dissection of ureterocele. The operation of heminephrureterectomy or dissection of ureterocele with resection of the paracystic part of the ureter were performed with antireflux utererocystoanastomosis.
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PMID:[Ectopic ureterocele]. 280 Jan 73

We report three patients in whom hydronephrosis was diagnosed by ultrasonography in utero. In two fetuses, ureteroceles were detected prenatally and these proved to be the cause of obstruction. In the third, bilateral simple ureteroceles were discovered immediately after birth. In the last patient, failure to see ureteroceles in utero may have been related to the phenomenon of ureterocele eversion and prolapse into the ureter. Ultrasonographers should be aware of this prolapse phenomenon as a potential pitfall for both the in utero and postpartum diagnosis of ureterocele.
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PMID:Prenatal and immediate postnatal ultrasonographic diagnosis of ureterocele. 294 96

During a 6-year period (1979-1985), 142 neonates with significant hydronephrosis were seen. Seventy-eight percent of the cases were discovered on fetal screening during obstetric sonography. Maternal/fetal intervention was virtually never indicated and most babies were asymptomatic. The most common conditions found were obstruction of the ureteropelvic junction (41%), obstruction of the distal ureter (usually primary megaureter) (23%), upper-pole hydronephrosis associated with duplex anomalies (13%), and posterior urethral valves (10%). Seventeen neonates with multicystic dysplastic kidney were seen (three per year or one for every eight with hydronephrosis). In comparison, during the 30-year period, 1947-1977, 146 neonates with significant hydronephrosis were seen. Most cases were discovered because the patients had signs and/or symptoms--either an abdominal mass (an enlarged kidney or bladder) or urosepsis. The three most common conditions were obstruction of the ureteropelvic junction (22%), posterior urethral valves (19%), and ectopic ureterocele (14%). During this period, 53 neonates with multicystic dysplastic kidney were discovered (two per year or one for every three with hydronephrosis). The dramatic increase in the number of neonates found to have hydronephrosis is primarily due to the widespread use of obstetric sonography and concomitant fetal screening. The pattern of causes before 1979 represented the incidence of symptomatic lesions. The current pattern more accurately reflects the true incidence of congenital anomalies of the urinary tract.
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PMID:Neonatal hydronephrosis in the era of sonography. 303 9

Sonographic air/CO2 contrast studies of the urinary bladder allow identification of abnormal peri- and intravesical low-echogenic structures and can differentiate between those that communicate with the bladder (refluxing ureters, bladder diverticula, patent urachus) from others that do not communicate (cysts of ovarian/enteric origin, urachus cyst). Ureteroceles with a refluxing/obstructed ureter can be more clearly delineated using gas contrast than with plain ultrasound. In a group of 217 children examined by bladder contrast sonography, 19 showed pathological peri- and intravesical findings, 17 of which were definitely evaluated by bladder contrast sonography. On the other hand, only 10 abnormalities of these 19 could be detected, and in not more than 8 was the final diagnosis made by plain sonography alone.
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PMID:Differential diagnosis of intra- and perivesical abnormalities using bladder air/CO2 contrast sonography. 308 38

We report a case of inverted Y duplication of the ureter in association with an obstructing ectopic ureterocele and paraureteral diverticulum. Preoperative radiological studies demonstrated the ureterocele and diverticulum but they failed to show the duplex distal ureter. The duplicated section of ureter was excised and a Cohen reimplantation was performed. The presence of a large ureterocele obstructing the bladder neck, a diverticulum, failure of reflux into the ectopic segment and poor function of the affected kidney all contributed to the difficulties in establishing a preoperative diagnosis.
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PMID:Inverted Y duplication of the ureter in association with ureterocele and bladder diverticulum. 309 94

Extensive gross, microscopic and clinical studies of various ureteral anomalies have enabled investigators to set forth theories regarding the aetiologies of these anomalies consistent with observed fact. Synthesis of these observations allows for a simplified classification of mega-ureter (primary obstructed, reflux and non-obstructed, non-reflux mega-ureters), ureterocele, duplex ureters and ectopic ureters based upon some combination of mesenchymal differentiation anomalies and location anomalies. A defect early in mesenchymal differentiation would be expected to result in panureteral disease. A defect later in development would result in a focal abnormality anywhere along the course of the ureter. Influence upon ureteral bud mesenchyme by local expansion factors in the bladder base may result in various types of ureterocele. Position of the ureteral orifice on the trigone or in Wolffian duct derivatives would occur in accordance with the Weigert-Meyer principle and would correlate with upper tract dysplasias. Thus, an attempt has been made to systematize and trace the origins of mega-ureter, ureterocele, duplex ureters and ectopic ureters to defects of differentiation of the basic mesoblastic cell in aberrant locations of the ureteral bud.
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PMID:Embryogenesis of ureteral anomalies: a unifying theory. 317 2

Over an 8 year period, the antenatal diagnosis of uropathy has been evoked for 125 fetuses, but confirmed only in 22%; in the other cases, it was insufficient (50%) or wrong (28%). Early surgery was useful only in few cases during the first days of life (section of urethral valves, temporary nephrostomy); in most cases, surgery was performed between 1 and 3 months of age; total or partial nephrectomy (mainly for multicystic dysplasia and ureteral duplication with ureterocele or ectopy), and generally conservative surgery (resection of pyelo-ureteral junction, vesico-ureteral reimplantation because of reflux or mega-ureter). The long-term results depend upon the degree of renal dysplasia: the prognosis is good in all the cases of operated hydronephrosis, but is often poor in uropathies characterized by early obstructive phenomena during intra-uterine life such as urethral valves. In those cases, the course of renal insufficiency cannot always be prevented by neonatal surgery.
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PMID:[Care and treatment of uropathies detected in utero. Evaluation of an 8-year experiment]. 320 Jun 61

The ectopic ureterocele is a relatively frequent congenital abnormality of the urinary tract. Its clinical signs are often uncharacteristic. Therefore the sometimes discrete changes in the diagnostic evaluations have to be looked for. The various procedures of which the excretory urography still plays a central role are discussed with their possibilities and limitations. The removal of the mostly dysplastic upper segment with its ureter is usually the most sensible treatment. Only in rare cases, where scintigraphically and clinically the segment seems preservable, a ureteropyelostomy is indicated. The different indications for primary and secondary excision of the ureterocele itself are outlined. A minimal therapy, that does not correct the underlying anatomical abnormality like the endoscopic incision should be reserved for uroseptic emergencies.
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PMID:[Ectopic ureterocele--diagnosis and therapy]. 329 82


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