Abstract:A 27-year-old male who visited our hospital because of pneumonia was diagnosed as hyperIgM immunodeficiency syndrome. His serum IgM level was markedly elevated, while the serum level ofIgD was normal with a markedly decreased level of serum IgG and IgA. The proportion of T and B cells of peripheral blood lymphocytes was normal. However, B cells bearing surface IgG or IgA were not detectable by immunofluorescence technique. There was a consanguineous marriage in his family, suggesting that his disorder was caus… Show more
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