My wife is 22 weeks pregnant, and during her ultrasound, it was noted that the renal pelvis of the right kidney is measuring 9mm, which the doctor mentioned is prominent. What could this mean, and is there anything we should be worried about? Is there a solution or treatment for this?

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.