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Venous renal tumor extension: a prospective US evaluation
Radiology
|August 1, 1985
Summary
Ultrasonography (US) effectively detects renal vein and inferior vena cava (IVC) tumor extension in renal neoplasms. This imaging technique shows high sensitivity and specificity, offering a valuable alternative for preoperative assessment.
Area of Science:
- Radiology
- Oncology
- Medical Imaging
Background:
- Venous tumor extension is a critical factor in renal neoplasm staging and treatment planning.
- Accurate preoperative assessment of venous involvement is essential for surgical strategy.
Purpose of the Study:
- To evaluate the diagnostic capability of ultrasonography (US) in determining venous tumor extension in patients with renal neoplasms.
- To compare the efficacy of US with traditional methods like inferior venacavography.
Main Methods:
- Prospective study of 120 consecutive patients with renal neoplasms.
- Real-time ultrasonography was used to visualize the inferior vena cava (IVC) and renal veins.
- Sensitivity and specificity calculations for US in detecting tumor thrombi and invasion.
Main Results:
- Renal vein involvement was observed in 18% and caval extension in 11% of patients.
- US visualized the retrohepatic IVC in 96% and renal veins in 88% of cases.
- US demonstrated 100% sensitivity and specificity for caval thrombi and 95.5% sensitivity/100% specificity for renal vein invasion.
Conclusions:
- Ultrasonography is a highly accurate and valuable tool for preoperative assessment of intravascular tumor extension in renal neoplasms.
- US provides a reliable and less invasive alternative to inferior venacavography for evaluating venous involvement.