Imbruvica (Ibrutinib): First Drug Approved for the Treatment of Patients with Waldenström's Macroglobulinemia.

Waldenstrom's macroglobulinemia (WM), also known as lymphoplasmacytic lymphoma, is an indolent subtype of B-cell non-Hodgkin lymphoma.1,2 WM is characterized by malignant B-cells that overproduce the abnormal monoclonal protein known as immunoglobulin (Ig) M or macroglobulin.2