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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Does Fetal Left Renal Pelvis Slightly Prominent With AP Diameter 8mm Mean?

what it means in report of the scanning of the pregnant women as Fetal left renal pelvis is slightly prominent with AP diameter 8 mm and what are its impact on the new born, as the child is born few days back and doctor as advised for scanning as the earlier scanning report for refering to the problem

Wed, 22 Oct 2014
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Radiologist,  's  Response
Hi,
Thanks for writing in.

If there is no associated problem like urinary obstruction or posterior urethral valve causing reflux then a dilatation of 8 mm is not something to worry about. Research has been done on this topic in many newborns and it has been found that a renal pelvis diameter smaller than 10 mm on neonatal sonography was of no pathologic significance because renal collecting systems normalized spontaneously in all infants within 1 year of birth. These neonates and infants had no significant risk for urinary tract infection and did not need further evaluation.

However getting one ultrasound scan of the child in the first week after birth is important to rule out any residual problem leading to possible obstruction to passage of urine or reflux from urinary bladder to kidney.
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What Does Fetal Left Renal Pelvis Slightly Prominent With AP Diameter 8mm Mean?

Hi, Thanks for writing in. If there is no associated problem like urinary obstruction or posterior urethral valve causing reflux then a dilatation of 8 mm is not something to worry about. Research has been done on this topic in many newborns and it has been found that a renal pelvis diameter smaller than 10 mm on neonatal sonography was of no pathologic significance because renal collecting systems normalized spontaneously in all infants within 1 year of birth. These neonates and infants had no significant risk for urinary tract infection and did not need further evaluation. However getting one ultrasound scan of the child in the first week after birth is important to rule out any residual problem leading to possible obstruction to passage of urine or reflux from urinary bladder to kidney.