Ureteropelvic junction obstruction
UPJ obstruction is the most common cause of prenatally diagnosed hydronephrosis. It can occur bilaterally but is more frequently seen unilaterally with a left-sided preference. Common findings include abdominal mass, flank or abdominal pain, nausea, vomiting, urinary tract infections, hematuria, and failure to thrive. Some patients may be asymptomatic. Rarely, and if untreated, kidney failure may occur. Surgery may be required.
Q62.11 – Congenital occlusion of ureteropelvic junction
95575002 – Obstruction of pelviureteric junction
Differential Diagnosis & Pitfalls