Adverse urologic consequences of spinal cord resection at the time of kyphectomy: value of preoperative urodynamic evaluation.

Four children with thoracic level paraplegia and severe myelokyphosis underwent distal spinal cord resection at the time of kyphectomy. All four children were continent before spinal cord resection and became incontinent immediately afterward. Two children in retrospect had preoperative urodynamics that showed intact innervation to the external sphincter, and two had no preoperative urodynamic studies. All four had evidence of lower urinary tract denervation on urodynamic studies performed after cord resection. The urologic and urodynamic consequences of spinal cord resection at the time of kyphectomy in children with myelodysplasia are reviewed. Resection of the distal spinal cord in thoracic level myelodysplasia may cause postoperative incontinence in some previously continent patients. Preoperative urodynamic evaluation and urologic consultation is recommended. If individual evaluation indicates that residual sacral function is beneficial to urologic management, kyphectomy without cord resection is preferable.