|Definition||A combined T cell and B cell immunodeficiency characterized by classic Kaposi sarcoma of childhood, poor T-cell recall immune responses, and decrease in the proportion of circulating memory B cells that has_material_basis_in homozygous or compound heterozygous mutation in TNFRSF4 on chromosome 1p36.33.
combined immunodeficiency due to OX40 deficiency [EXACT]
combined immunodeficiency with childhood-onset Kaposi sarcoma [EXACT]
combined immunodeficiency with impaired immunity to HHV-8 [EXACT]
combined immunodeficiency with impaired immunity to human herpes virus 8 [EXACT]
OX40 deficiency [EXACT]