T-cell activity is examined less frequently in other disorders, but as we learn more about how the immune system works, it is becoming part of the routine process for assessing many immune conditions and some types of cancer. T cell are also known as T lymphocytes. The "T" stands for "thymus" — the organ in which these cells mature. As opposed to B cells which mature in the bone marrow.
* * *T cell n any of several lymphocytes (as a helper T cell) that differentiate in the thymus, possess highly specific cell-surface antigen receptors, and include some that control the initiation or suppression of cell-mediated and humoral immunity (as by the regulation of T and B cell maturation and proliferation) and others that lyse antigen-bearing cells called also T lymphocyte see CYTOTOXIC T CELL, HELPER T CELL, SUPPRESSOR T CELL, T4 CELL
Medical dictionary. 2011.
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