NBME 20

nbme20/Block 3/Question#46

Removal of the thymus at birth results in severely ...

Thymic lymphocytes produced before thymectomy are long-lived

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submitted by hayayah(229),

By age 75, the thymus is little more than fatty tissue. Fortunately, the thymus produces all of your T cells by the time you reach puberty. They are long-lived and that's why you can lose your thymus without impairment of your immune system.

sweetmed  Memory T cells live for six months or less in healthy humans (Westera et al., 2013), whereas naive T cells can live for up to nine years +