TY - CHAP M1 - Book, Section TI - Chapter 13. Vesicoureteral Reflux A1 - Tanagho, Emil A. A1 - Nguyen, Hiep T. A2 - McAninch, Jack W. A2 - Lue, Tom F. Y1 - 2013 N1 - T2 - Smith & Tanagho's General Urology, 18e AB - Under normal circumstances, the ureterovesical junction allows urine to enter the bladder but prevents urine from regurgitating into the ureter, particularly at the time of voiding. In this way, the kidney is protected from high pressure in the bladder and from contamination by infected vesical urine. When this valve is incompetent, the chance for development of urinary infection is significantly enhanced, and pyelonephritis may occur. In significant cases especially in children, pyelonephritis—acute, chronic, or healed—is secondary to vesicoureteral reflux (VUR). SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/10/13 UR - accesssurgery.mhmedical.com/content.aspx?aid=56942594 ER -