Ureteral Stricture Disease

Ureteral stricture disease, also known as ureteral stricture or ureteral stenosis, is a medical condition characterized by the narrowing or constriction of one or both of the ureters. Ureters are muscular tubes that carry urine from the kidneys to the bladder, and when they become narrowed or blocked, it can lead to various health issues.

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Ureteral stricutres may be classified as intrinsic or extrinsic. Intrinsic ureteral strictures occur due to structural abnormalities or damage within the ureter itself. Causes include scar tissue formation, inflammation or congenital conditions. Extrinsic ureteral strictures result from external pressure on the ureters. This pressure can be caused by adjacent structures such as tumors, fibrosis or surgical procedures.

The symptoms of ureteral stricture can vary depending on the severity and location of the stricture. Common signs and symptoms include:

• Pain in the side of the abdomen or lower back, which can be mild to severe
• The presence of blood in the urine (hematuria)
• Urinary tract infections (UTIs)
• Decreased urine output
• Swelling of the kidney due to the backup of urine

Several factors can lead to the development of ureteral strictures:

• Chronic urinary tract infections can cause inflammation and scarring, leading to strictures.
• The passage of kidney stones through the ureter can damage the lining, leading to strictures.
• Injury to the ureter during surgery or accidents can result in strictures.
• Radiation treatment for cancer in the pelvic area may cause ureteral damage.
• Some individuals may be born with ureters that are naturally narrow, increasing their risk of developing strictures.
• Both benign and malignant tumors can exert pressure on the ureters, causing extrinsic strictures.
• Conditions like interstitial cystitis or retroperitoneal fibrosis can lead to inflammation and scarring of the ureters.

The first step in diagnosis involves discussing your symptoms and medical history with a healthcare provider. A physical examination may also be conducted to assess any abdominal or flank tenderness.

Various imaging techniques may be employed to visualize the ureters and diagnose the stricture:

• Ultrasound: This noninvasive test can provide initial information but may not offer the most detailed images of the ureters.
• CT scan: A computed tomography (CT) scan can provide detailed images of the urinary tract, helping identify the location and severity of the stricture.
• MRI: Magnetic resonance imaging (MRI) may be used for further evaluation, especially if there are concerns about radiation exposure.
• Urodynamic tests: These tests can assess how well the urinary system is functioning and may help diagnose ureteral strictures.
• Cystoscopy: A thin, flexible tube with a camera (cystoscope) is inserted through the urethra and into the bladder to examine the ureteral openings and the interior of the bladder.
• Ureteroscopy: A narrow, flexible tube (ureteroscope) is passed through the bladder and into the ureter to directly visualize and assess the stricture.

The choice of treatment depends on the severity of the stricture, its location and the underlying cause. Treatment options include:

• Medications: Antibiotics are prescribed to treat any associated infections, while pain relievers can help manage discomfort.
• Ureteral stenting: A stent, a tube-like device, can be temporarily placed within the ureter to keep it open. This is often a short-term solution to relieve symptoms.
• Balloon dilation: During this procedure, a balloon is inserted into the ureter and inflated to widen the stricture. It may provide relief in some cases.
• Surgery: Surgical interventions are considered for more severe or complex strictures. Options include:
  • Ureteral reimplantation: The affected portion of the ureter may be removed, and the remaining healthy sections are reconnected.
  • Ureteral reconstruction: In cases of long or complicated strictures, reconstruction of the ureter with healthy tissue may be necessary.

Early diagnosis and appropriate medical intervention can significantly improve the outlook for those with ureteral strictures. Whether it involves medication, minimally invasive procedures or more extensive surgical interventions, tailored treatment plans can provide relief and help maintain kidney function.