Sarhan O, Al Awwad A, Al Otay A, et al. - Since Anderson–Hynes dismembered pyeloplasty is considered the standard surgical treatment for ureteropelvic junction obstruction (UPJO) and the commonly used stents are either an internal double-J (DJ) or an externalized pyeloureteral (PU) stents, researchers sought to assess the outcome of using DJ vs PU stents following open pyeloplasty for UPJO in children. One hundred seventy-five patients who underwent primary open pyeloplasty in two tertiary hospitals were retrospectively evaluated. In total, 110 patients had internal DJ stent insertion (63%), while 65 patients (37%) had placement of external PU stent. In terms of overall complication and success rates after pyeloplasty, the two types of stents are comparable. Although internal DJ stent insertion results in a shorter hospital stay, removal requires a second operating room visit and anesthesia.