<unk>  (HIGM-1) is the X-linked variant of the hyper IgM syndrome. The affected individuals are virtually always male, because males only have one X chromosome, received from their mothers. Their mothers are not symptomatic, even though they are carriers of the allele, because the trait is recessive. Male offspring of these women have a 50% chance of inheriting their mother's mutant allele.
Hyper-IgM syndrome type 1
Hyper-IgM syndrome type 5
Hyper-IgM syndrome type 2
Hyper-IgM syndrome type 3
Hyper-IgM syndrome type 4
Hyper IgM syndrome
Anti-IgLON5 disease
Wiskott–Aldrich syndrome