Distal ureteral atresia, megaureter of a lower pole of a duplicated kidney: the rare clinical case

Ureteral atresia is a rare pathology, the diagnosis of which is difficult, and a unified approach to the method of surgical correction has not been formed. The aim of this study is to demonstrate a rare clinical case of a patient with distal ureteral atresia of a non-functioning lower pole of a duplicated kidney, and also to present the method of surgical treatment. A 12-year-old female patient was diagnosed with a cystic formation of the retroperitoneal space. During the operation, it was determined that this cyst was an atretic, dilated ureter of a lower pole of the duplacated kidney. Lower heminefrureterectomy was chosen as the method of surgical correction. Ureteral atresia is rarely combined with any other anomalies of the upper urinary tract, and the presented clinical case has not previously been described in the available foreign and Russian literature. The methods of surgical correction of ureteral atresia include nephrureterectomy, ureteroureterostomy, intestinal ureteroplasty, and Boari procedure. In the presented case, heminefrureterectomy was chosen because of severe hypoplasia of the lower pole of the duplicated kidney and the almost complete absence of its parenchyma. When examining patients with cystic formations of the retroperitoneal space, it is necessary to remember about the ureteral atresia, which may be accompanied by other anomalies of the upper urinary tract.