Which immunoglobulin is typically elevated in Waldenström macroglobulinemia?

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Multiple Choice

Which immunoglobulin is typically elevated in Waldenström macroglobulinemia?

In Waldenström macroglobulinemia, the malignant clone predominantly secretes a monoclonal IgM immunoglobulin, which raises this specific type of antibody in the blood and often leads to hyperviscosity. The IgM class is the best answer because its monoclonal overproduction is the hallmark of the disorder, and IgM’s large, pentameric structure contributes to the increased viscosity. IgG, IgA, and IgE are not characteristically elevated in this condition, so they don’t reflect the typical profile of Waldenström macroglobulinemia.

In Waldenström macroglobulinemia, the malignant clone predominantly secretes a monoclonal IgM immunoglobulin, which raises this specific type of antibody in the blood and often leads to hyperviscosity. The IgM class is the best answer because its monoclonal overproduction is the hallmark of the disorder, and IgM’s large, pentameric structure contributes to the increased viscosity. IgG, IgA, and IgE are not characteristically elevated in this condition, so they don’t reflect the typical profile of Waldenström macroglobulinemia.

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