Lymphoplasmacytic lymphoma with prominent mast cell infiltrates

[Figure][1] An asymptomatic 66-year-old woman presented with an elevated total protein of 9.1 g on routine blood work. Serum protein electrophoresis showed an immunoglobulin A (IgA) κ (kappa) M-spike measuring 3570 mg/dL with depression of immunoglobulins M and G (IgM and IgG). Renal