[A novel cause of acute kidney injury in multiple myeloma: Lenalidomide-induced acute interstitial nephritis]. / Une cause originale d'insuffisance rénale aiguë au cours du myélome multiple : néphrite interstitielle aiguë induite par le lénalidomide.

INTRODUCTION: Lenalidomide is an immunomodulatory drug widely used in the treatment of multiple myeloma. Several cases of nephrotoxicity have been reported, but few have been documented histologically. CASE PRESENTATION: We report a case of acute interstitial nephritis to lenalidomide in a 62-year-old patient with multiple myeloma after administration of the second course of chemotherapy according to the protocol combining bortezomib, lenalidomide and dexamethasone. The outcome was quickly favorable after stopping lenalidomide, with corticosteroid therapy. CONCLUSION: Lenalidomide may be responsible for acute interstitial nephritis. When acute kidney injury occurs in myeloma, the nephrotoxicity of therapeutic agents should be considered in addition to the common causes of kidney failure. The chronology of events and the histological data are essential and guide the specific management.