Urodynamics findings pre? and post?untethering surgery in children with filum lipoma: A single?institution experience


We aimed to investigate the changes in urodynamics and voiding cystourethrogram parameters on pre- and post-untethering surgery in patients aged under 2?years with filum lipoma.


Sixty-two patients were enrolled in this study. The changes in urodynamics and voiding cystourethrogram parameters were compared before untethering surgery and 6?months after untethering surgery. These parameters were bladder volume, bladder deformity, vesicoureteral reflux during voiding cystourethrogram, detrusor overactivity, bladder compliance, and post-void residual volume in urodynamics.


Bladder volume during voiding cystourethrogram and bladder compliance increased significantly from 89.8?±?49.5?mL to 114.5?±?50.5?mL (P?=?0.0069) and 10.2?±?6.2?mL/mmH2O to 17.0?±?13.3?mL/mmH2O (P?=?0.0008), respectively, at 6-month follow-up. Six patients required combination management with clean intermittent catheterization at 25.1?±?8.2?months (14.3?±?6.5-months follow-up) because of elevated post-void residual volumes.


According to voiding cystourethrogram results, bladder function and urodynamics in patients with filum lipoma significantly improved after untethering surgery. Non-invasive assessment based on measurements of post-void residual should be considered as a postoperative follow-up method.