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- W4308903526 abstract "<h3>Introduction</h3> X-Linked Lymphoproliferative Disease Type 1 (XLP1) is a rare disease of males caused by mutation in the gene <i>SH2D1A</i> and is characterized by vulnerability to EBV infection, lymphoma and dysgammaglobulinemia. Fulminant infectious mononucleosis in early childhood is the most common clinical manifestation, but on rare occasions XLP1 does not present until adulthood. <h3>Case Description</h3> We present a 43-year-old male with a history of recurrent sinusitis and bronchitis and leukopenia since childhood. He had EBV infection when he was 18 years old complicated by jaundice and hepatitis that required treatment with corticosteroids. At the age of 42, he developed ITP and was found to have mild splenomegaly. Serum immunoglobulins were mildly abnormal with IgG of 575, IgM of 762 and IgA of 145 mg/dL. Lymphocyte immunophenotyping was within normal limits and serum protein electrophoresis and serum free light chains were normal. Bone marrow biopsy was unremarkable. Invitate PID panel was performed, which revealed a pathogenic variant in SH2D1A gene (c.2T>C). SAP expression by flow cytometry revealed absence in NK cells but present in 17% of CD8+ T cell population suggestive of a somatic reversion in this population. He had mildly decreased NK cell function and positive EBV serology. <h3>Discussion</h3> We present a case of XLP1 diagnosis in adulthood with a history of EBV infection of moderate severity and mild initial immunologic abnormalities. In patients with somatic reversion in CD8+ T cells, milder disease may be more common and genetic testing should be considered early. The management options including bone marrow transplant should be carefully considered." @default.
- W4308903526 created "2022-11-19" @default.
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- W4308903526 date "2022-11-01" @default.
- W4308903526 modified "2023-09-30" @default.
- W4308903526 title "X-LINKED LYMPHOPROLIFERATIVE DISEASE: DIAGNOSTIC CHALLENGE IN A MIDDLE-AGED MALE" @default.
- W4308903526 doi "https://doi.org/10.1016/j.anai.2022.08.907" @default.
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