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The thymus (pl.: thymuses or thymi) is a specialized primary lymphoid organ of the immune system. Within the thymus, thymus cell lymphocytes or T cells mature. T cells are critical to the adaptive immune system , where the body adapts to specific foreign invaders.
Thymic carcinoma, or type C thymoma, is a malignancy of the thymus. It is a rare cancer that is often diagnosed at advanced stages. Recurrence following treatment is common, and thymic carcinoma is associated with a poor prognosis. [1]
The primary (or central) lymphoid organs, including the thymus, bone marrow, fetal liver and yolk sac, are responsible for generating lymphocytes from immature progenitor cells in the absence of antigens. [12] The thymus and the bone marrow constitute the primary lymphoid organs involved in the production and early clonal selection of ...
Tumors of the hematopoietic and lymphoid tissues (American English) or tumours of the haematopoietic and lymphoid tissues (British English) are tumors that affect the blood, bone marrow, lymph, and lymphatic system.
Thymic cancer is a general term for a cancer of the thymus gland. Thymic carcinoma; Thymoma This page was last edited on 11 May 2022, at ...
The thymus contributes fewer cells as a person ages. As the thymus shrinks by about 3% [ 15 ] a year throughout middle age, a corresponding fall in the thymic production of naive T cells occurs, leaving peripheral T cell expansion and regeneration to play a greater role in protecting older people.
The red bone marrow is a key element of the lymphatic system, being one of the primary lymphoid organs that generate lymphocytes from immature hematopoietic progenitor cells. [24] The bone marrow and thymus constitute the primary lymphoid tissues involved in the production and early selection of lymphocytes.
These B cells then leave the bone marrow and migrate via bloodstream and the lymph to peripheral lymphoid tissues, such as a spleen, lymph nodes, tonsils and mucosal tissues. Once in a secondary lymphoid organ the B cell can be introduced to an antigen that it is able to recognize. [citation needed]
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