The diagnosis of<unk>  can be done via the following methods and tests: * MRI * Chest radiography * Pulmonary function test * Lymph node test * Laboratory test (to measure CD40) Types Five types of<unk>  have been characterized: *<unk>  type 1 (X-linked), characterized by mutations of the CD40LG gene. In this type, T cells cannot tell B cells to switch classes. *<unk>  type 2 (autosomal recessive), characterized by mutations of the AICDA gene. In this type, B cells cannot recombine genetic material to change heavy chain production *<unk>  type 3 characterized by mutations of the CD40 gene. In this type, B cells cannot receive the signal from T cells to switch classes. *<unk>  type 4 which is a defect in class switch recombination downstream of the AICDA gene that does not impair Somatic Hypermutation. *<unk>  type 5 characterized by mutations of the UNG gene.
Hyper IgM syndrome
Hyper-IgM syndrome type 5
Hyper-IgM syndrome type 2
Hyper-IgM syndrome type 3
Hyper-IgM syndrome type 4
Hyper-IgM syndrome type 1
Anti-IgLON5 disease
Common variable immunodeficiency