Lenvatinib Linked to Nephrotic Syndrome in VHL Syndrome: Case Highlights Rare Kidney Complication

Given the patient’s complex medical history, including hypertension, diabetes, hypothyroidism, and a prior stroke, other causes of nephrotic syndrome were considered and ruled out. The kidney injury was ultimately attributed to LEN, which was promptly discontinued following multidisciplinary consultation.

Following cessation of LEN and initiation of supportive care—including blood pressure control, diabetes management, thyroid correction, and infection monitoring—the patient experienced a gradual decrease in proteinuria, reaching 0.66 g/day at the six-month follow-up. His kidney function remained stable, and imaging showed a slight reduction in the pancreatic lesion.

The authors emphasized that LEN-induced nephrotoxicity likely results from its inhibition of VEGFR and PDGFR, disrupting endothelial function and glomerular integrity. While proteinuria is a well-known side effect of VEGF inhibitors, this is reportedly the first case of LEN-induced TMA and FSGS-like kidney injury in a VHL syndrome patient.

The case contributes to a growing body of evidence that highlights the renal risks of TKIs, particularly when used long-term or at higher doses. Kidney biopsies in similar reports have frequently shown microangiopathic damage or podocyte injury. The report reinforces that early identification and discontinuation of the offending agent can lead to partial or complete remission of symptoms.

Given the expanding use of LEN in oncology, the authors stress the importance of routine urinalysis and early renal biopsy when abnormalities arise. They also note the potential of alternative targeted therapies like belzutifan, which may offer effective tumor control with a lower risk of renal toxicity.

"The case highlights a critical, albeit rare, side effect of lenvatinib in the treatment of VHL syndrome, pointing to the necessity of individualized treatment strategies, vigilant monitoring, and timely intervention to minimize long-term complications," the authors concluded.

Reference:

Zhang, S., Li, Y. & Wen, W. Case report: Nephrotic syndrome induced by Lenvatinib treatment in a patient with von Hippel-Lindau syndrome. BMC Nephrol 26, 370 (2025). https://doi.org/10.1186/s12882-025-04303-z