Definition congenital dilatation of the ureter above aperistaltic normal caliber juxtavesical segment. In human studies, a megaureter is defined as a ureter with a diameter of 7 mm or more kass 1992. The incidence of obstructed megaureter is 1 per 10,000 population. In children, any ureter greater than 7 mm in diameter is considered a megaureter based on.
A megaureter is an anomaly with a dilated ureter of more than 78 mm, the further division is made according to the cause. Megaureter in an adult is often due to distal obstruction, occasionally gross reflux or commonly idiopathic i. However definitive criteria for defining the megaureter have not been established in animals. The two important questions about megaureter are whether there is reflux backwash of. Tratamiento del megaureter congenito obstructivo primario emc urologia, vol. Tratamiento del megaureter congenito obstructivo primario 190815. The term congenital primary megaureter includes causes of an enlarged ureter which are intrinsic to the ureter, rather than as a result of a more distal abnormality. Laparoscopic nephroureterectomy for adult patient with. Your story ureter reimplantation and megaureter repair. A 29yearold female with a complaint of abdominal distension was referred to our hospital. We present the case of a 39yearold male, who presented with a 6month.
Tratamiento del megaureter congenito obstructivo primario. R zubieta a, r castillo g, jm escala a, m varela a. Megaureter, the accepted term for the dilated ureter, is divided into primary congenital and secondary categories. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. The ureters are the tubes that carry urine from the kidneys to the bladder.
Megaureter article about megaureter by the free dictionary. When the ureter becomes enlarged and prevents efficient peristalsis to flow urine normally, it is called a megaureter. Congenital megaureter is an uncommon condition which is more common. Megaureter is defined as a ureter that exceeds the upper limits of normal size. Criterio quirurgico del megaureter primario enfoque. A megaureter is a ureter that is much wider than normal. There is a growing interest in minimally invasive treatment of primary obstructive megaureter pom in children. Megaureteres, estudio y conducta medica scielo cuba infomed. Nonrefluxing nonobstructive megaureter is a rare condition, usually diagnosed in asymptomatic neonates. She had a history of being treated for pyelonephritis three times. The differential diagnosis of anh, in order of likelihood, includes transient primary hydronephrosis, ureteropelvic junction obstruction upjo, vesicoureteric reflux vur, ureterovesical junction.
Reimplantation techniques are similar to those used for correcting primary vur. A megaureter large ureter is when a ureter is wider than threeeighths of an inch. Each category is further subdivided into 1 refluxing nonobstructing. A b c d e f g h i j k l m n o p q r s t u v w x y z az listings contact us. Even if idiopathic the patient can be symptomatic due to urinary stasis. Primary megaureter is due to obstructed or refluxing vesicoureteral junction, while secondary megaureter is caused by bladder outlet. The two important questions about megaureter are whether there is reflux backwash of urine causing the. Megaureter is the medical term for an enlarged ureter. Primary megaureter is due to an intrinsic ureteral defect usually stenosis above the ureterovesical junction. Teklali praticien hospitalier, chirurgie pediatrique. Megaureter congenito obstructivo primario, tratamiento. The first megaureter classification was proposed in 1976 in philadelphia. A 19yearold male patient was admitted with flank pain, which had lasted intermittently for four years.
Megaureter is an abnormality of one or both of the ureters of a child. Imaging features of bilateral primary megaureter in a. Congenital megaureter is an uncommon condition which is more common in males, may be bilateral, and is often associated with. Renal function and urine drainage after conservative or. Refluxing primary megaureter is a result of an abnormal vesicoureteric junction, which impedes the normal antireflux mechanisms. Normal ureteral diameter in children is rarely 5 mm ureters 7 mm are considered mgus the dilated ureter or mgu. The ureter is a tubelike structure that urine passes through on its way from the kidney to the bladder. Megaureter and other congenital ureteral anomalies. The absence of longterm followup data, however, makes it. Megaloureter definition of megaloureter by medical. This can be due to a short vertical intramural segment, congenital paraureteric diverticulum, ureterocoele with or without associated duplicated collecting system.
A64month oldboywith ashort history ofurinary tract infection with urethral valves andobstructive megaureters. My son, luke dangel, was admitted to childrens hospital boston last september for ureter reimplantation and. Ureters are the two funnelshaped tubes that carry urine from the kidneys to the bladder. A ureter that is wider than 38 inch is a megaureter. Rare case of nonrefluxing nonobstructive megaureter in. Megaureter knowledge for medical students and physicians. Megaureter pediatric patient stories boston childrens. Megaureter is a medical anomaly whereby the ureter is abnormally dilated.
Muscle dysplasia was found in 8 of 34 cases of nonreflux megaureter, in 1 of 22 cases of reflux megaureter, in 4 of 23 cases of ectopic ureter of single system, in 4 of 9 cases of ectopic ureter. Megaureter is a ureter that is much wider than normal. This can result from an abnormality of the ureter itself primary or from the bladder being blocked secondary. Primary megaureter or megaloureter is an uncommon cause of severe hydronephrosis 1. The megauretermegacystis syndrome is an extreme form of the primary refluxing megaureters in which massive reflux prevents effective bladder emptying because.
We examined renal function and urinary drainage of children with primary megaureter pmu in dependence on conservative or operative treatment. Megaureter primario no refluyente detectado prenatalmente anales. A megaureter means big ureter and is a descriptive term, not a diagnosis. The two important questions about megaureter are whether there is reflux backwash of urine causing the megaureter or whether there is blockage at the ureterovesical junction causing megaureter figure 1. Megaureter in children health encyclopedia university. Obstruction is bilateral in 10%20% of obstructed megaureter cases. Megaureter secondary to severe vur or obstruction is usually managed with ureteral reimplantation. Primary obstructive megaureter with giant ureteral stone.
943 1386 287 1575 899 7 721 1441 451 764 1290 1411 593 610 756 635 298 1007 790 405 166 750 388 723 863 88 1248 758 1262 294 942 468 686 174 1351 1570 19 808 802 500 1272 397 24 141 131 909 845 1068 768 1003