Shows significantly reduced lymphocytes, serum IgG, IgA, IgM volume can be normal, but individual components can increase or decrease, and the antibody formation was defective. A variety of antigen delayed hypersensitivity skin test does not react. Phytohemagglutinin, allogeneic cell antigen Deng Jun difficult to bring in patients with lymphocyte transformation. Lymph node biopsy in thymus-dependent area, see the lack of lymphoid tissue, bone marrow plasma cells can be seen.
Chest X-ray can show the thymus smaller or can not see.
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