Both the peripheral blood and marrow samples will be tested for the presence of variable region (VL) germline genes in our Tufts Medical Center laboratory. In addition, plasma isolated from the peripheral blood sample (as well as the corresponding identified germline gene) will be sent to the laboratory of Dr. Jonathan Wall at the University of Tennessee for assay analysis. The assay will seek to distinguish the presence of amyloidogenic vs. non-amyloidogenic light chains. Germline gene results from Tufts Medical Center will be shared with patients and their physicians; however, University of Tennessee assay analysis will not be shared due to its experimental nature.