CXCR3 and thyroid gland undifferentiated (anaplastic) carcinoma: Another chemokine receptor, CXCR3, is expressed by both T and NK cells at a moderate level, and it has been shown that the NK cells found in anaplastic thyroid cancer foci express CXCR3 at a higher level than those found in the peripheral blood NK cells, which indicates the involvement of this receptor in the redirection of NK cells to the tumor focus [64].