Term Name:	immunodeficiency with hyper-IgM type 4
Synonyms:	HIGM4, hyper-IgM syndrome type 4
Definition:	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.
Ontology:	Human Disease [DOID:0060760]   ( DOID:0060760 )