Abstract:Background. A T cell positive and B cell negative (T+B-) flow cytometry crossmatch (FCXM) result remains a conundrum since HLA-class I antigens are expressed on both T and B cells. We investigated the frequency, HLA specificity of the antibodies and mechanisms for the T+B- FCXM result.
Methods. We analyzed 3073 clinical FCXM tests performed in an American Society of Histocompatibility and Immunogenetics accredited histocompatibility laboratory. The sera associated with the T+B- FCXM were also tested for d… Show more
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