Kidney toxicities of modern cancer immunotherapies: Mechanisms, diagnosis, and management

Immunotherapy has transformed oncology, yet kidney complications increasingly affect outcomes. This review summarizes nephrotoxicity from immune checkpoint inhibitors (ICIs), chimeric antigen receptor T-cell (CAR-T) therapies, and bispecific T-cell engagers (BiTEs). ICIs remain most used, with acute interstitial nephritis (AIN) as the hallmark lesion, while glomerular diseases and electrolyte abnormalities are less common. CAR-T therapy, though highly effective in hematologic cancers, carries risks of cytokine release syndrome, tumor lysis syndrome, and acute kidney injury (AKI). BiTEs, particularly teclistamab, show higher AKI rates than CAR-T, though mechanisms remain unclear. Early recognition, tailored management, and multidisciplinary collaboration are essential to ensure safe therapy and preserve kidney function.