Abstract
Despite being rarely discussed, perinephric lymphatics are involved in many pathological and benign processes. The lymphatic system in the kidneys has a harmonious dynamic with ureteral and venous outflow, which can result in pathology when this dynamic is disturbed. Although limited by the small size of lymphatics, multiple established and emerging imaging techniques are available to visualize perinephric lymphatics. Manifestations of perirenal pathology may be in the form of dilation of perirenal lymphatics, as with peripelvic cysts and lymphangiectasia. Lymphatic collections may also occur, either congenital or as a sequela of renal surgery or transplantation. The perirenal lymphatics are also intimately involved in lymphoproliferative disorders, such as lymphoma as well as the malignant spread of disease. Although these pathologic entities often have overlapping imaging features, some have distinguishing characteristics that can suggest the diagnosis when paired with the clinical history.
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Eskildsen, D.E., Guccione, J., Menias, C.O. et al. Perirenal lymphatics: anatomy, pathophysiology, and imaging spectrum of diseases. Abdom Radiol 48, 2615–2627 (2023). https://doi.org/10.1007/s00261-023-03948-4
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DOI: https://doi.org/10.1007/s00261-023-03948-4