Practical Reviews

Retroperitoneal Lesions Can Be Characterized by MRI

Background: The perirenal space includes the kidneys, adrenal glands, proximal ureters, and fat. Multiple different pathologies can occur in this location. Objective: To review the MR imaging appearances of perirenal pathologies. Solid masses: The most common solid lesion is renal cell carcinoma. Of urothelial cell carcinomas, 5% can involve the renal calices, pelvis, or proximal ureter in the perirenal space. Renal leiomyosarcomas are rare but can arise from the renal capsule or v more...
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