ABSTRACT
Ureteropelvic junction obstruction (UPJO) is the most common cause of hydronephrosis in neonates. It is likewise not infrequently seen in adult urologic practice and all urologists should be familiar with indications for treatment and basic reconstructive options. Classically, patients may present with flank pain, nausea, vomiting, fever, or hematuria. Additional potential sequelae may include kidney infection, stone formation, and loss of renal function.
