A case report of dipeptidyl peptidase 4 inhibitor-related kidney disease combined with renal cancer.

A kidney biopsy was performed in a 64-year-old woman with type 2 diabetes mellitus and less than 1 g of proteinuria who rapidly progressed to end-stage renal failure after approximately 2 years of treatment with two dipeptidyl peptidase 4 (DPP-4) inhibitors for type 2 diabetes mellitus. The biopsy revealed not only a coincidental diagnosis of renal cell carcinoma, which was not evident on pre-biopsy computed tomography, but also severe thrombotic microangiopathy (TMA)-like glomerular endothelial cell damage in the noncancerous areas. These results suggest that DPP4 inhibitors may have been involved in two kidney diseases.
Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
(Copyright © 2024 Kurihara, Sawa, Sumida, Ikuma, Oba, Mizuno, Sekine, Yamanouchi, Hasegawa, Suwabe, Urakami, Kono, Kinowaki, Ohashi, Yamaguchi and Ubara.)