<unk>  is a form of Hyper IgM syndrome which is a defect in class switch recombination downstream of the AICDA gene that does not impair somatic hypermutation.
Hyper-IgM syndrome type 4
Hyper-IgM syndrome type 5
Hyper-IgM syndrome type 2
Hyper-IgM syndrome type 3
Hyper-IgM syndrome type 1
Hyper IgM syndrome
Anti-IgLON5 disease
Wiskott–Aldrich syndrome