Related Experiment Video
Updated: Jul 10, 2026

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
Published on: October 12, 2017
Functional ureteral obstruction due to complex pelvic venous anomaly
Mirjam Huwyler1, Jurgen K Willmann, Hubert John
1Department of Urology, University Hospital Zurich, Zurich, Switzerland. Mirjam.Huwyler@insel.ch
Pelvic venous anomalies can rarely cause ureteral obstruction. Multi-detector row computed tomography aids in diagnosing these rare extrinsic ureteral obstruction causes.
Area of Science:
- Urology
- Radiology
- Vascular Medicine
Background:
- Ureteral obstruction can arise from various causes, including extrinsic compression.
- Retroperitoneal lesions, both benign and malignant, are common considerations.
- Rarely, vascular anomalies can present as a cause of ureteral obstruction.
Observation:
- A case of a 31-year-old woman presenting with right distal ureteral obstruction is detailed.
- The obstruction was caused by a complex pelvic venous anomaly.
- This highlights an unusual etiology for extrinsic ureteral compression.
Findings:
- Pelvic venous anomalies are identified as a rare differential diagnosis for ureteral obstruction.
- Multi-detector row computed tomography (MDCT) demonstrated significant value in visualizing the anomaly.
- Three-dimensional reconstruction capabilities of MDCT were crucial for depicting the complex vascular structure.
Implications:
- Clinicians should consider venous anomalies in the differential diagnosis of extrinsic ureteral obstruction.
- MDCT is a valuable imaging modality for the diagnosis and characterization of venous anomalies causing ureteral issues.
- Understanding these rare causes can improve diagnostic accuracy and patient management.
Related Concept Videos
Veins of the Abdomen and Pelvis
The inferior vena cava is fed by numerous smaller veins. The lumbar veins, for instance, drain the posterior abdominal wall, emptying both directly into the inferior vena cava and into the...
Disorders of the Urinary System
Urinary tract infections (UTIs) are one of the most common urinary system disorders. They are caused by bacteria that enter the urethra and can spread to the bladder resulting in cystitis. Pyelonephritis is the result of a UTI that has ascended to the level of the...
Imaging Studies V: Intravenous Urography and Retrograde Pyelography
Imaging Studies VI: Voiding Cystourethrography and Cystography
Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations
Urinary Tract Calculi VI: Surgical Management