In comparison with the peripheral lymphocytes, the thyroid-infiltrating lymphocytes from FNAB samples of both nodules with HT and controls showed a significantly higher expression of all three chemokine receptors and their combinations except CRTH2 in controls and CCR5+/CRTH2+ in nodules with HT (Table 2 and Figure 1). The gene discussed is PTGDR2; the disease is hematocrit.