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Lymphomatous infiltration of the kidney in a patient with Waldenstrom's macroglobulinemia. | LitMetric

Lymphomatous infiltration of the kidney in a patient with Waldenstrom's macroglobulinemia.

Clin Nephrol Case Stud

Department of Internal Medicine, Division of Nephrology and Hypertension, University of Minnesota Medical Center, Minneapolis, MN, USA.

Published: December 2022

AI Article Synopsis

Article Abstract

Kidney disease can be an initial presentation or a chronic manifestation of plasma cell dyscrasias. Here, we describe a rare presentation of kidney disease driven by lymphomatous infiltration of the kidney in a patient with Waldenstrom's macroglobulinemia (WM). A 70-year-old female with an 8-year history of WM (IgM, κ) was referred for declining renal function. Prior to presentation, she had stable WM disease without evidence of worsening disease burden. She had been previously hospitalized with SARS-CoV-2 infection and acute kidney injury (AKI). Her serum creatinine (sCr) peaked at 3.7 mg/dL (baseline 0.9 mg/dL) but recovered to 1.1 mg/dL by the time of discharge. Two months after discharge, her sCr increased to 1.9 mg/dL, and she had new proteinuria of 1.5 g/day. Kidney biopsy showed lymphomatous infiltration of the interstitium without glomerular involvement. Treatment with rituximab and bendamustine resulted in an improvement in renal function (sCr 1.4 mg/dL). WM is an uncommon hematologic malignancy, and extramedullary involvement, including renal involvement, is rare. This case emphasizes the importance of surveillance for kidney dysfunction in patients with plasma cell dyscrasias, even if patients appear to have stable lymphoproliferative disease.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9795319PMC
http://dx.doi.org/10.5414/CNCS110756DOI Listing

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