@cdeldeo IgE is an immunoglobulin that often is related to allergies. It is very rarely associated with MGUS. Have you had any testing by an immunologist regarding allergies? I recall a long time ago, my mother going through allergy testing, and the only thing she was not allergic to was her cat!

Also, https://www.msdmanuals.com/en-kr/home/immune-disorders/immunodeficiency-disorders/hyper-ige-syndrome#:~:text=Hyper%2DIgE%20syndrome%20is%20a,%2C%20lungs%2C%20or%20other%20organs.
Ginger

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