Overview
A fistula from the renal pelvis to other vascular structures, such as the inferior vena cava, is an uncommon complication following nephrectomy, often presenting with signs of hemolytic anemia or hemodynamic instability. 1Diagnosis
Clinical Presentation: Hemolytic anemia, hemodynamic instability, or incidental findings post-nephrectomy.
Imaging: CT angiography, MRI, or conventional angiography to identify the fistulous tract.
Laboratory Tests: Elevated indirect bilirubin, decreased haptoglobin, and schistocytes on peripheral smear indicative of hemolysis.Management
First-Line Treatment: Transcatheter embolization using devices like the Amplatzer vascular plug for definitive closure.
Adjunctive Measures: Supportive care including blood transfusions and management of anemia until definitive repair.Special Populations
Postoperative Trauma: Patients with recent nephrectomy and subsequent trauma may be at higher risk; close monitoring is essential. 1Key Recommendations
Perform imaging studies (CT angiography, conventional angiography) to confirm the diagnosis of renal artery stump to inferior vena cava fistula (Evidence: Moderate 1).
Utilize transcatheter embolization with devices such as the Amplatzer vascular plug for definitive treatment (Evidence: Weak 1).
Provide supportive care including blood transfusions to manage hemolytic anemia until definitive intervention (Evidence: Expert opinion 1).References
1 Taneja M, Lath N, Soo TB, Hiong TK, Htoo MM, Richard L et al.. Renal artery stump to inferior vena cava fistula: unusual clinical presentation and transcatheter embolization with the Amplatzer vascular plug. Cardiovascular and interventional radiology 2008. link