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[Imaging of renal metastases]
J N Bruneton1, J Drouillard, F Laurent
1Service de Radiodiagnostic, Centre Antoine-Lacassagne, Nice.
Journal De Radiologie
|November 1, 1988
Summary
Metastatic kidney tumors are common but appear late in cancer. Most were hypovascular, requiring careful differential diagnosis from other renal lesions.
Area of Science:
- Nephrology
- Oncology
- Radiology
Background:
- Metastases are the most frequent malignant tumors of the kidney.
- These lesions typically present as a late manifestation of neoplastic disease.
Purpose of the Study:
- To characterize the imaging findings of renal metastases.
- To discuss the differential diagnosis of these lesions.
Main Methods:
- Retrospective review of 19 cases with renal metastases.
- Utilized various imaging techniques including CT, ultrasonography, urography, angiography, and MRI.
- Evaluated tumor vascularity in 15 cases.
Main Results:
- Common primary malignancies included lung cancer, melanoma, and contralateral renal cancer.
- Most renal metastases were hypovascular (14/15 cases).
- Lesions were solitary (8 cases) and unilateral (9 cases).
Conclusions:
- Renal metastases are typically hypovascular and can mimic other renal pathologies.
- Accurate diagnosis requires consideration of primary malignancy and imaging features.
- Differential diagnosis includes cysts, lymphoma, other renal cancers, abscesses, and infarcts.