Which disorder typically presents with a sharp monoclonal spike in the gamma region and hyperviscosity?

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Multiple Choice

Which disorder typically presents with a sharp monoclonal spike in the gamma region and hyperviscosity?

A monoclonal IgM protein causing high blood viscosity is the hallmark of Waldenström's macroglobulinemia. In this disorder the malignant clone is a lymphoplasmacytic cell that overproduces IgM, a very large antibody. When IgM is present in large amounts, the serum becomes thick, leading to hyperviscosity. That viscosity issue explains the classic symptoms: blurred vision or visual changes, mucosal bleeding, headaches, dizziness, and neurologic complaints, especially in advanced cases. The sharp M-spike seen on protein electrophoresis reflects the monoclonal IgM rise driving these effects. Other conditions have different patterns: multiple myeloma typically features IgG or IgA with bone lesions and related symptoms rather than viscosity issues; MGUS involves a small, asymptomatic M-protein without hyperviscosity or end-organ damage; CLL is a leukemia with lymphocytosis and is not primarily defined by an IgM-driven hyperviscosity process.

A monoclonal IgM protein causing high blood viscosity is the hallmark of Waldenström's macroglobulinemia. In this disorder the malignant clone is a lymphoplasmacytic cell that overproduces IgM, a very large antibody. When IgM is present in large amounts, the serum becomes thick, leading to hyperviscosity. That viscosity issue explains the classic symptoms: blurred vision or visual changes, mucosal bleeding, headaches, dizziness, and neurologic complaints, especially in advanced cases. The sharp M-spike seen on protein electrophoresis reflects the monoclonal IgM rise driving these effects.

Other conditions have different patterns: multiple myeloma typically features IgG or IgA with bone lesions and related symptoms rather than viscosity issues; MGUS involves a small, asymptomatic M-protein without hyperviscosity or end-organ damage; CLL is a leukemia with lymphocytosis and is not primarily defined by an IgM-driven hyperviscosity process.

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