Abstract:
:We report here the successful treatment of cold agglutinin-associated refractory hemolysis with bortezomib in a patient with Waldenström's macroglobulinemia (WM). A 78-year-old man was referred to our hospital with cold hemagglutinemia of unknown cause. Laboratory examination revealed a hemoglobin concentration of 6.9 g/dL, serum IgM concentration of 1904 mg/dL, and a titer of cold hemagglutinin of over ×8192. Serum immunoelectrophoresis demonstrated monoclonal protein of the IgM-κ type. A bone marrow aspirate showed many lymphoplasmacytic cells, which were positive for CD19, CD20, CD38, and cytoplasmic μ and κ light chains. A diagnosis of WM-associated cold hemagglutinemia was made. Because of red blood cell transfusion-dependency, we treated him with intravenous fludarabine, oral melphalan-prednisolone, cyclophosphamide, and melphalan, and two courses of R-CHOP in sequence with a marked decrease of serum IgM (928 mg). We then started weekly bortezomib plus dexamethasone (BD) therapy, as he was still transfusion-dependent. Soon after the initiation of BD, he achieved transfusion independence, with a further decrease in serum levels of IgM and marked improvement of anemia. Interestingly, his marrow abnormal lymphocytes were later found not to carry the MYD88 L265P mutation. The successful treatment with bortezomib for WM lacking this mutation is discussed.
journal_name
Int J Hematoljournal_title
International journal of hematologyauthors
Izumi M,Tsunemine H,Suzuki Y,Tomita A,Kusumoto T,Kodaka T,Itoh K,Takahashi Tdoi
10.1007/s12185-015-1775-3subject
Has Abstractpub_date
2015-08-01 00:00:00pages
238-43issue
2eissn
0925-5710issn
1865-3774journal_volume
102pub_type
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