The percentage of CRTH2+ lymphocytes was significantly higher in nodules/patients with HT in comparison with controls in thyroid-infiltrating lymphocytes from FNAB samples (13.95 versus 6.7%, p = 0.008) as well as in peripheral lymphocytes (6.7 versus 5.13%, p = 0.047). Here, PTGDR2 is linked to hematocrit.