Interiliac Ureter: A Rare Venous Anomaly Causing Hydronephrosis.

Developmental variations in the inferior vena cava often remain unnoticed in clinical practice. While most anomalies are asymptomatic, certain configurations can lead to obstructive uropathy. The retrocaval and retroiliac ureter are known to cause symptoms due to mechanical obstruction of the ureter. Prior research has shown that these anomalies are rare but clinically significant. No prior work had resolved the exact anatomical presentation of an interiliac ureter. This gap motivated further investigation into how such anomalies manifest in diagnostic imaging. The absence of infrarenal inferior vena cava is a rare anatomical variant. Understanding its impact on ureteric course is essential for diagnostic accuracy. This paper contributes specific imaging insights into a rare venous anomaly.

The aim of this case report is to describe a rare anatomical variant involving the inferior vena cava and its clinical implications. The specific problem is the presentation of hydronephrosis caused by an interiliac ureter. The motivation stems from the need to highlight uncommon anatomical configurations that may be misdiagnosed. This case provides a visual reference for interiliac ureter on computed tomography scans. The absence of infrarenal inferior vena cava is a key diagnostic clue. This anomaly may be overlooked in routine imaging assessments. The study seeks to improve recognition of such rare anatomical variants. These findings may aid in accurate diagnosis and treatment planning.

The study utilized computed tomography imaging to visualize the anatomical anomaly. The patient was a 30-year-old male presenting with hydronephrosis symptoms. The imaging protocol included contrast-enhanced scans to delineate vascular structures. The ureter's course was analyzed in relation to the iliac veins. The absence of infrarenal inferior vena cava was confirmed using multiplanar reconstructions. The abnormal union of the common iliac veins was identified at the right renal hilum. The study focused on the spatial relationship between the ureter and venous structures. This approach allowed for detailed anatomical mapping of the interiliac ureter.

The computed tomography images revealed an interiliac ureter coursing between the two common iliac veins. The iliac veins united at an unusually high position near the right renal hilum. The absence of infrarenal inferior vena cava was a key finding in this case. The ureteric obstruction was attributed to this anomalous venous configuration. The hydronephrosis was localized to the right upper ureter. The imaging confirmed the absence of the typical infrarenal segment of the vena cava. The abnormal venous union was identified as the primary cause of ureteric compression. These findings were consistent with a rare venous anomaly causing hydronephrosis.

The authors propose that this case highlights the importance of recognizing rare venous anomalies in hydronephrosis diagnosis. The interiliac ureter is a rare cause of ureteric obstruction. The absence of infrarenal inferior vena cava is a significant anatomical variant. This configuration may lead to mechanical obstruction of the ureter. The study emphasizes the role of computed tomography in identifying such anomalies. The high-level union of the iliac veins is a critical diagnostic feature. The hydronephrosis was directly linked to the anatomical configuration described. These findings may guide further diagnostic and therapeutic approaches in similar cases.