Ipsilateral ureteroureterostomy is safe and efficacious for treating abnormalities associated with ureteral duplication. A significant discrepancy in ureteral size does not preclude ureteroureterostomy.

Significant improvement of voiding dysfunction after surgical lysis of the terminal filum in children with MR imaging-documented normal lumbosacral spines was observed. In such children, in whom neurogenic dysfunction is identified by urodynamic testing, structural abnormalities of the terminal filum may exist. A prospective randomized controlled study of children undergoing surgical terminal filum lysis in cases of minimal TCS should be undertaken.

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