Infiltrative Renal Malignancies: Imaging Features, Prognostic Implications, and Mimics
Radiographics . 2021 Jan 15;200123. doi: 10.1148/rg.2021200123. Online ahead of print.
David E Sweet, Ryan D Ward, Yanbo Wang, Hajime Tanaka, Steven C Campbell, Erick M Remer
Infiltrative renal malignancies are a subset of renal masses that are morphologically characterized by a poorly defined interface with the renal parenchyma. Infiltrative renal malignancies are less common but more aggressive than more typical renal malignancies and carry an overall worse prognosis. Although an infiltrative renal process often represents a malignant neoplasm, infiltrative masses include a wide spectrum of diseases including primary renal cortical, medullary, and pelvic tumors; lymphoproliferative processes; metastases; and various infectious, inflammatory, immune-mediated, and vascular mimics. The imaging features of these masses are often nonspecific, but with the appropriate history, laboratory results, and clinical context, the radiologist can help narrow the diagnosis and guide further treatment.
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