What a Clinical Hematologist Should Know about T Cells?

T cell’s journey begins from the bone marrow and ends in the peripheral tissues by either fighting the infections or residing in the secondary lymphoid organs as memory T cell. Thymus plays most important role in transforming a docile T cell precursor into a warrior. T cell is one of the most important cells in health and disease. Various diseases originate from qualitative or quantitative defects in T cells leading to various inherited and acquired diseases. This simple and short review is focused on the basic understanding and clinical hematologist’s perspective of T cells.