Acute tubulointerstitial nephritis and IgM deposits on glomerular capillary walls after immunotherapy with nivolumab for metastatic renal cell carcinoma

AbstractNivolumab is an anti-programmed cell death-1 antibody that is utilized as an immune checkpoint inhibitor for several malignancies. However, this agent is associated with immune-related adverse events (irAEs), mainly in the spectrum of autoimmune disease including interstitial pneumonia, colitis, type 1 diabetes, and renal impairment. We herein present the case of a 59-year-old man with renal cell carcinoma who developed worsening renal function approximately 4  months after initiation of nivolumab. Urinalysis showed proteinuria and microscopic hematuria along with increase levels ofN-acetyl- β-d-glucosaminidase. Renal biopsy revealed acute tubulointerstitial nephritis and thickening of the glomerular basement membranes. Immunofluorescence showed granular IgM deposits in capillary loops. We initiated high-dose prednisolone therapy with nivolumab, which improved renal function and achieved complete remission of proteinuria. Although renal irAEs are considered to be rare and glomerulonephropathy is not typical presentation, physicians need the close monitoring of renal function and urinalysis in patients under immunotherapy with this agents. In addition, our case provides a possible link between nivolumab and immune-mediated glomerulonephropathy.
Source: CEN Case Reports - Category: Urology & Nephrology Source Type: research

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