I'm really worried about my wife's pregnancy. During the 22-week ultrasound, the scan showed that the renal pelvis of the baby's right kidney is measuring at a prominent 9mm. Can you help me understand what this might mean and if there's anything we should be doing about it?

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Accepted Answer

A 9mm measurement of the renal pelvis in the right kidney is considered mild pyelectasis, which is a common finding in fetal ultrasound scans, occurring in about 1-2% of pregnancies. In most cases, mild pyelectasis resolves on its own before or shortly after birth. However, it's essential to monitor the condition through regular ultrasound scans to ensure it doesn't worsen or indicate any underlying issues, such as ureteropelvic junction obstruction or vesicoureteric reflux. Your gynaecologist  may recommend follow-up scans every 4-6 weeks to assess the renal pelvis's size and check for any potential complications.