Congenital megaureter

Congenital megaureter

The normal ureteric diameter in children up to 16 years is 0.50–0.65 /uni00A0 mm. If the ureter is dilated by more than 7 /uni00A0 mm, it - is classed as a dilated or megaureter. This may occur with or without obstruction or reflux. Most cases of megaureter with obstruction present in childhood with severe infections. Renal stones can f orm easily in the dilated systems. Surgical correc - tion is indicated in symptomatic patients who have recurrent urinary tract infections (UTIs), progressive dilation on US and di ff erential renal function of less than 40%. Surgery involves excision of the stenosed distal ur eter and non-refluxing ureteric reimplantation.