重複尿管
WordNet
- make a duplicate or duplicates of; "Could you please duplicate this letter for me?"
- a copy that corresponds to an original exactly; "he made a duplicate for the files" (同)duplication
- being two identical (同)matching, twin, twinned
- make or do or perform again; "He could never replicate his brilliant performance of the magic trick" (同)reduplicate, double, repeat, replicate
- identically copied from an original; "a duplicate key"
- either of a pair of thick-walled tubes that carry urine from the kidney to the urinary bladder
PrepTutorEJDIC
- (他のものと)『そっくり同じの』,『複製の』 / (同じようなものが)対になっている / (原物とそっくり同じ)『写し』,控え,複写,写本,複製[物](copy) / (2個同時に作製したものの)一方,(そっくり同じものの)片方,片割れ / 〈原本・原作など〉‘を'複写する,複製する / …‘を'そっくり模倣する / …‘を'2重(2倍)にする / 〈同じこと〉‘を'繰り返す
- 尿管(じん臓から膀胱(ぼうこう)に尿を送る筋肉質の管)
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/08/14 13:50:58」(JST)
[Wiki en表示]
Duplicated ureter or Duplex Collecting System is a congenital condition in which the ureteric bud, the embryological origin of the ureter, splits (or arises twice), resulting in two ureters draining a single kidney. It is the most common renal abnormality, occurring in approximately 1% of the population.[1][2] The additional ureter may result in a ureterocele, or an ectopic ureter.
Contents
- 1 Pathophysiology
- 2 Classification
- 3 Prevalence
- 4 Clinical Presentation
- 5 References
- 6 See also
Pathophysiology
Ureteral development begins in the human fetus around the 4th week of embryonic development. A ureteric bud, arising from the mesonephric (or Wolffian) duct, gives rise to the ureter, as well as other parts of the collective system. In the case of a duplicated ureter, the ureteric bud either splits or arises twice. In most cases, the kidney is divided into two parts, an upper and lower lobe, with some overlap due to intermingling of collecting tubules. However, in some cases the division is so complete as to give rise to two separate parts, each with its own renal pelvis and ureter.
Classification
One of a series of IVP films at 15 minutes after injection of contrast medium showed incomplete duplication of left collecting system.
Ureteral duplication is either:
- Partial - i.e. the two ureters drain into the bladder via a single common ureter. Partial, or incomplete, ureteral duplication is rarely clinically significant.[2]
- or
- Complete - in which the two ureters drain separately. Complete ureteral duplication may result in one ureter opening normally into the bladder, and the other being ectopic, ending in the vagina, the urethra or the vulval vestibule. These cases occur when the ureteric bud arises twice (rather than splitting).[3]
Prevalence
Duplicated ureter is the most common renal abnormality, occurring in approximately 1% of the population.[2] Race: Duplicated ureter is more common in Caucasians than in African-Americans. Sex: Duplicated ureter is more common in females. However, this may be due to the higher frequency of urinary tract infections in females, leading to a higher rate of diagnosis of duplicated ureter.
Clinical Presentation
Prenatally diagnosed hydronephrosis (fluid-filled kidneys) suggest post-natal follow-up examination. The strongest neo-natal presentation is urinary tract infection. A hydronephrotic kidney may present as a palpable abdominal mass in the newborn, and may suggest an ectopic ureter or ureterocele. In older children, ureteral duplication may present as:
- Urinary tract infection - most commonly due to vesicoureteral reflux (flow of urine from the bladder into the ureter, rather than vice versa).
- Urinary incontinence in females occurs in cases of ectopic ureter entering the vagina, urethra or vestibule.
References
- ^ Siomou E. et al, Duplex collecting system diagnosed during the first 6 years of life after a first urinary tract infection: a study of 63 children, Journal of Urology, 2006; 175(2):678-81; discussion 681-2
- ^ a b c J. Gatti, J. Murphy, J. Williams, H. Koo, emedicine overview, Ureteral Duplication, Ureteral Ectopia, and Ureterocele
- ^ Sadler, T. W., Langman's medical embryology - 11th ed. p. 240, ISBN 978-0-7817-9069-7.
See also
- Ureterocele
- Ectopic ureter
- Kidney development
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Congenital malformations and deformations of urinary system (Q60–Q64, 753)
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| Abdominal |
| Kidney |
- Renal agenesis/Potter sequence, Papillorenal syndrome
- cystic
- Polycystic kidney disease
- Meckel syndrome
- Multicystic dysplastic kidney
- Medullary sponge kidney
- Horseshoe kidney
- Renal ectopia
- Nephronophthisis
- Dent's disease
- Alport syndrome
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| Ureter |
- Ectopic ureter
- Megaureter
- Duplicated ureter
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| Pelvic |
| Bladder |
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| Urethra |
- Epispadias
- Hypospadias
- Posterior urethral valves
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| Vestigial |
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Index of the urinary system
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| Description |
- Anatomy
- Physiology
- Development
- Cells
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| Disease |
- Electrolyte and acid-base
- Congenital
- Neoplasms and cancer
- Other
- Symptoms and signs
- Urine tests
- Blood tests
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| Treatment |
- Procedures
- Drugs
- Intravenous fluids
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UpToDate Contents
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English Journal
- Intraoperative Management of an Incidentally Identified Ectopic Ureter Inserting Into the Prostate of a Patient Undergoing Radical Prostatectomy for Prostate Cancer: A Case Report.
- Singhal U1, Dauw CA, Li AY, Miller DC, Wolf JS Jr, Morgan TM.
- Medicine.Medicine (Baltimore).2015 Aug;94(32):e1261. doi: 10.1097/MD.0000000000001261.
- Congenital variations in urinary tract anatomy present unique surgical challenges when they present without prior knowledge. Ectopic ureters occur as a rare anatomic variation of the urinary tract and are often associated with duplicated renal collecting systems. While the condition is uncommon, eve
- PMID 26266359
- Absorption of the Wolffian duct and duplicated ureter by the urogenital sinus: morphological study using human fetuses and embryos.
- Naito M1, Hinata N2, Rodriguez-Vazquez JF3, Murakami G4, Aizawa S1, Fujisawa M2.
- BJU international.BJU Int.2015 Jul;116(1):135-41. doi: 10.1111/bju.13006. Epub 2015 Mar 26.
- OBJECTIVES: To describe the embryological origin of the duplicated ureter and to investigate whether the urogenital sinus absorbs not only the Wolffian duct (WD) but also the ureter.MATERIALS AND METHODS: During studies using sections of human fetuses (45 specimens), we incidentally found a specific
- PMID 25430868
- Horseshoe kidney transplantation.
- Nemes B, Kanyári Z, Zádori G, Zsom L, Berhés M, Hamar M, Kóbor K, Péter A.
- Interventional medicine & applied science.Interv Med Appl Sci.2015 Jun;7(2):85-9. doi: 10.1556/1646.7.2015.2.7. Epub 2015 Jun 11.
- Horseshoe kidney is a fusion anomaly found in approximately one in 400-600 people. Due to vascular and ureteral variations, transplantation with a horseshoe kidney presents a technical challenge. In our case, the isthmus connected the upper poles and contained parenchyma. It consisted of three renal
- PMID 26120481
Japanese Journal
- 異所開口尿管摘除術 (手術手技 小児泌尿器科手術(1)尿路系の手術(4))
- 前立腺部尿管異所開口を有する前立腺癌に対し前立腺全摘除術を施行した1例
Related Links
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★リンクテーブル★
[★]
- 英
- duplicated ureter, bifid ureter, double ureter
- 同
- 重複腎盂 double renal pelvis、重複腎盂尿管 double renal pelvisand ureter
[show details]
疫学
- 1%以下。
- 完全型と不完全型の頻度はほぼ同じ。性差無し。
病型
参考
[★]
- 関
- copy、duplication、overlap、redundantly、replicate、replication、replicational、replicative、reproduce、reproduction