multiple myeloma

https://doi.org/10.1351/goldbook.13477
Plasma cell malignancy resulting in high levels of monoclonal immunoglobulin (Ig) in serum and of free light chains (Bence–Jones protein) in urine.
See also: myeloma
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1215 [Terms] [Paper]