Flow cytometric analysis of T-cell subpopulations confirmed CD4 lymphopenia (CD4 189 cells/μL), normal numbers of CD8 T cells (383 cells/μL), and an increased proportion and absolute number of CD3+TCRαβ+CD4−CD8− double negative T cells (DNT) (4.3%, 33 cells/μL). This evidence concerns the gene CD8A and lymphopenia.