INTRODUCTION. Primary Megaureter is a congenital anomaly of the urinary tract, it constitutes approximately 10% of uropathies. It is a dilation of the ureter to a diameter > 7 mm regardless of the cause. Surgical management of primary obstructive megaureter in the first year of life involves temporary or permanent treatment methods, among the permanent ones there is ureteral reimplantation with or without progressive reduction of the dilated segment, it is recognized as the definitive treatment in older patients 12 months. OBJECTIVE. To establish the efficacy of ureteral reimplantation in primary obstructive megaureter in children under 12 months of age to avoid repercussions on renal function at an early age. MATERIALS AND METHODS. This study is a bibliographic review of the secondary source literature, and is based on the available evidence and qualified by the Strobe and Consort checklist. Using the PICOT strategy and MESH terms, an advanced search of the last 10 years was carried out in various databases including Pubmed, Medline, The Cochrane Library, EMBASE and Elsevier. RESULTS: A total of 60,479 articles were initially identified, of which 12 studies met the inclusion and exclusion criteria. CONCLUSION: Ureteral reimplantation is a procedure that was previously not considered as an alternative in patients younger than 12 months, but good efficacy and complete resolution of the problem have been demonstrated, without the need for several surgical interventions.

KEY WORDS: megaureter; congenital ureteral obstruction/urological surgical procedures; ureteral reimplantation; urologic/laparoscopic/robotic surgical procedures.