CD5 B-Cell Predominant Primary Immunodeficiency: Part of the Spectrum of MAGT1 Deficiency.

Recent studies of the magnesium transporter 1 (MAGT1) gene mutation reveal glycosylation defects contributing to more phenotypic variance than the “XMEN” title pathologies. The updated title, “X-linked MAGT1 deficiency with increased susceptibility to EBV-infection and N-linked glycosylation defect,” was proposed in 2020. [..] To reflect the patient population more accurately, a prospective classification update may consider MAGT1 glycobiological errors contributing to phenotypic variance but also pre-genetic testing era reports with CD5 B-cell predominance.