In A-T children, B-cell responses are very weak, and levels of immunoglobulins, the proteins that B-cells make to fight infection by specific recognition of invading organisms, may also be low.
Surprisingly, people with CVID will usually have a normal number of B cells, the type of white blood cells (B-cell lymphocytes) that make antibodies to fight infection.
B-cell (B lymphocyte)-A small white blood cell from bone marrow responsible for producing antibody and serving as a precursor for plasma cells.
Children with X-linked SCID have low T-cell and natural killer (NK) cell levels but elevated B-cell levels.
Makhoul, Hanan, et al. "Combined B-Cell and T-Cell Disorders." eMedicine, June 29, 2003.
B-cell lymphomas-Non-Hodgkin's lymphomas that arise from B cells.