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Review Question - QID 100494

Hyper IgM Syndrome QID: 100494 (M1.IM.14.73)
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QID 100494 (Type "100494" in App Search)
A 4-year-old Caucasian male patient presents with recurrent infections. During examination of his CD4 T-cells, it is noticed that his T-cells lack CD40 ligand. Which type of immunoglobulin is likely to be present in excess?
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