Primary megaureter in infants and children
- Laurence S Baskin, MD, FAAP
Laurence S Baskin, MD, FAAP
- Section Editor — Pediatric Urology
- Frank Hinman, Jr, MD, Distinguished Professorship in Pediatric Urology
- Chief Pediatric Urology
- Professor of Urology and Pediatrics
- UCSF Benioff Children's Hospital
Megaureter is defined as a ureter that exceeds the upper limits of normal size. In children, any ureter greater than 7 mm in diameter is considered a megaureter based on measurements in fetuses greater than 30 weeks gestation and children <12 years .
Primary megaureter is a result of a functional or anatomical abnormality involving the ureterovesical junction (figure 1), whereas secondary megaureter results from abnormalities that involve the bladder or urethra (eg, myelomeningocele/neurogenic bladder, and posterior urethral valves).
Primary megaureter in infants and children will be reviewed here.
Primary megaureter is classified according to the presence or absence of reflux and obstruction. Management of primary megaureter depends upon the type of megaureter. (See 'Postnatal management' below.)
The types of megaureter are as follows:To continue reading this article, you must log in with your personal, hospital, or group practice subscription. For more information on subscription options, click below on the option that best describes you:
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- CLINICAL PRESENTATION
- FURTHER EVALUATION
- DIFFERENTIAL DIAGNOSIS
- PRENATAL MANAGEMENT
- POSTNATAL MANAGEMENT
- Management options
- - Surgery
- - Medical management
- Antibiotic prophylaxis
- Clinical scenario
- - Nonrefluxing megaureter
- Asymptomatic patients
- Symptomatic patients
- - Refluxing megaureter
- Our approach
- - Prenatal presentation
- - Postnatal presentation
- SUMMARY AND RECOMMENDATIONS