A Rare Case: Submucosal stone formation after 20-years of dextranomer hyaluronic copolymer endoscopic sub ureteric injection for vesicoureteral reflux: Endoscopic Subureteric Injection. Nigerian Journal of Urology, [S. l.], v. 11, n. 1-2, p. 131–134, 2026. DOI: 10.5281/. Disponível em: https://nju.org.ng/index.php/nju/article/view/62. Acesso em: 23 oct. 2026.