Urinary Tract Cistern as a Rare Cause of Huge Abdominal Cystic Mass in an Infant: A Case Report

Urinary Tract Cistern as a Rare Cause of Huge Abdominal Cystic Mass in an Infant

Abstract

A 1-year-old patient was found to have a 10 cm cystic mass in the abdomen. The diameter of the lower end of the right ureter was 14 mm. Ultrasonography revealed that bilateral testes were not seen in the scrotal sac. The bladder was pushed to the right by the mass. DMSA renal scintigraphy revealed 98% function of the right kidney and 2% function of the left kidney. The patient underwent abdominal exploration and the mass was successfully removed. Pathology was reported as a benign cystic lesion. The patient's chromosome analysis was normal. It was emphasized that antenatal ultrasonography is important in the diagnosis of fetal abdominal cystic masses. It is important to determine the correct origin of cystic masses. This case represents a rare example of cystic masses that may be associated with megaureter and duplicated systems. Anatomic dissection and radiologic imaging are important tools in the differential diagnosis. In conclusion, the pathogenesis of primary megaureter is unclear and may involve embryologic remnants. Considering its rarity, infants with abdominal masses should also be considered for conditions that may be related to urologic cysts.