A Rare Case: Submucosal stone formation after 20-years of dextranomer hyaluronic copolymer endoscopic sub ureteric injection for vesicoureteral reflux: Endoscopic Subureteric Injection. Nig J Uro [Internet]. 2026 Apr. 2 [cited 2026 Oct. 23];11(1-2):131-4. Available from: https://mail.nju.org.ng/index.php/nju/article/view/62