| Namespace | disease_ontology | Obsolete | false |
| description | A hyper IgM syndrome that is characterized by normal or increased serum IgM concentrations associated with low or absent serum IgG, IgA, and IgE concentrations, indicating a defect in the class-switch recombination (CSR) process that has_material_basis_in homozygous or compound heterozygous mutation in the UNG gene on chromosome 12q23-q24.1. |
