patients are at risk of Kidney failure from multiple causes. after chemotherapy
you can have tumor lysis syndrome
, increased calsium level and even myeloma cast nephropathy. The doctor treating is the best judge based on the clinical profile and lot of other lab tests. as your doctor has told you wait for 2 to 3 weeks. in cases where kidney does not recover over this time kidney biopsy
can be done to find out what has gone wrong.