Renal impairment is a common complication of
multiple myeloma (MM). The estimated glomerular filtration rate (eGFR) using the Modification of Diet in Renal Disease formula is the recommended method for the assessment of renal function in patients with MM with stabilized serum
creatinine. In
acute renal injury, the RIFLE (risk, injury, failure, loss and
end-stage kidney disease) and
Acute Renal Injury Network criteria seem to be appropriate to define the severity of renal impairment. Novel criteria based on eGFR measurements are recommended for the definition of the reversibility of renal impairment. Rapid intervention to reverse renal dysfunction is critical for the management of these patients, especially for those with light chain cast nephropathy.
Bortezomib with high-dose
dexamethasone is considered as the treatment of choice for such patients. There is limited experience with
thalidomide in patients with myeloma with renal impairment. Thus,
thalidomide can be carefully administered, mainly in the context of well-designed clinical trials, to evaluate if it can improve the rapidity and probability of response that is produced by the combination with
bortezomib and high-dose
dexamethasone.
Lenalidomide is effective in this setting and can reverse
renal insufficiency in a significant subset of patients, when it is given at reduced doses, according to renal function. The role of
plasma exchange in patients with suspected light chain cast nephropathy and renal impairment is controversial. High-dose
melphalan (140 mg/m(2)) and autologous
stem-cell transplantation should be limited to younger patients with chemosensitive disease.