S1702 Isatuximab in Treating Patients With Relapsed or Refractory Primary Amyloidosis

Inclusion Criteria: * Patient must have relapsed or refractory primary systemic AL amyloidosis, histologically-confirmed by positive Congo red stain with green by birefringence on polarized light microscopy, OR characteristic appearance by electron microscopy AND confirmatory AL amyloid typing (mass spectrometry-based proteomic analysis or immunofluorescence) * Patient must have measurable disease within 28 days prior to registration; serum beta2 microglobulin, serum quantitative immunoglobulins (immunoglobulin \[Ig\]G, IgA, and IgM), serum free kappa and lambda, and serum protein electrophoresis (SPEP) with M-protein quantification must be obtained within 14 days prior to registration * Patient must demonstrate a difference in the involved serum free light chains (kappa or lambda) versus the uninvolved serum free light chain of \>= 4.5 mg/dL within 14 days prior to registration * Patient must have objective organ involvement defined by ONE (or more) of the following; all disease for involved organs must be assessed and documented on the AL baseline tumor assessment form * Kidney: albuminuria greater than or equal to 500 mg per day on a 24-hour urine specimen within 35 days prior to registration, OR prior kidney biopsy (at time of diagnosis) showing amyloid deposition * Heart: mean left ventricular wall thickness on echocardiogram greater than or equal to 12 mm in the absence of hypertension or valvular heart disease, OR N-terminal fragment brain natriuretic protein (NT…