| Disease ID | Source | Name | Description |
| 300400 | OMIM | Severe combined immunodeficiency X-linked T-cell-negative/B-cell-positive/NK-cell-negative (XSCID) | A form of severe combined immunodeficiency (SCID), a genetically and clinically heterogeneous group of rare congenital disorders characterized by impairment of both humoral and cell-mediated immunity, leukopenia, and low or absent antibody levels. Patients present in infancy recurrent, persistent infections by opportunistic organisms. The common characteristic of all types of SCID is absence of T-cell-mediated cellular immunity due to a defect in T-cell development. The disease is caused by variants affecting the gene represented in this entry. |
| 312863 | OMIM | X-linked combined immunodeficiency (XCID) | Less severe form of X-linked immunodeficiency with a less severe degree of deficiency in cellular and humoral immunity than that seen in XSCID. The disease is caused by variants affecting the gene represented in this entry. |