label: X-Linked Severe Combined Immunodeficiency
label_lc: x-linked severe combined immunodeficiency
description: An X-linked form of severe combined immunodeficiency characterized as T-cell negative, B-cell positive, NK cell negative, and with mutations in the IL2RG gene, resulting in an impairment of both humoral and cell-mediated immunity, leukopenia, and low or absent antibody levels.