Ureterovesical junction obstruction megaureters

Ureterovesical junction obstruction/ megaureters

• Ureterovesical junction (UVJ) obstruction is the second most common cause of antenatal hydronephrosis and arises from an adynamic and stenotic region obstructing the distal ureter near the bladder ( Figure 20.6 ). Older children may have a distal ureteric polyp or calculus and present with a UTI, haematuria, abdominal pain or a hydronephrotic mass. Ultrasonography shows ureteric dilation (megaureter), hydronephrosis or both (hydroureteronephrosis). Importantly , obstruction is not the - only cause of a dilated ureter. A primary megaureter refers to one that arises from an abnormality at the junction, whereas a secondary megaureter arises from a problem in the bladder or urethra (myelomeningocele/neurogenic bladder, PUV). Although reflux may cause a megaureter, it is also possible to have a refluxing obstructed megaureter, and so a voiding cystourethrogram is needed to look for reflux. A MAG-3 renal scan indicates the severity of obstruction. If intervention is required, ureteric reimplantation is performed. Ureterovesical junction obstruction/ megaureters

• Ureterovesical junction (UVJ) obstruction is the second most common cause of antenatal hydronephrosis and arises from an adynamic and stenotic region obstructing the distal ureter near the bladder ( Figure 20.6 ). Older children may have a distal ureteric polyp or calculus and present with a UTI, haematuria, abdominal pain or a hydronephrotic mass. Ultrasonography shows ureteric dilation (megaureter), hydronephrosis or both (hydroureteronephrosis). Importantly , obstruction is not the - only cause of a dilated ureter. A primary megaureter refers to one that arises from an abnormality at the junction, whereas a secondary megaureter arises from a problem in the bladder or urethra (myelomeningocele/neurogenic bladder, PUV). Although reflux may cause a megaureter, it is also possible to have a refluxing obstructed megaureter, and so a voiding cystourethrogram is needed to look for reflux. A MAG-3 renal scan indicates the severity of obstruction. If intervention is required, ureteric reimplantation is performed. Ureterovesical junction obstruction/ megaureters

• Ureterovesical junction (UVJ) obstruction is the second most common cause of antenatal hydronephrosis and arises from an adynamic and stenotic region obstructing the distal ureter near the bladder ( Figure 20.6 ). Older children may have a distal ureteric polyp or calculus and present with a UTI, haematuria, abdominal pain or a hydronephrotic mass. Ultrasonography shows ureteric dilation (megaureter), hydronephrosis or both (hydroureteronephrosis). Importantly , obstruction is not the - only cause of a dilated ureter. A primary megaureter refers to one that arises from an abnormality at the junction, whereas a secondary megaureter arises from a problem in the bladder or urethra (myelomeningocele/neurogenic bladder, PUV). Although reflux may cause a megaureter, it is also possible to have a refluxing obstructed megaureter, and so a voiding cystourethrogram is needed to look for reflux. A MAG-3 renal scan indicates the severity of obstruction. If intervention is required, ureteric reimplantation is performed.