To test the co-occurrence of PTGS2-expressing thyroid tumor cells and M2-macrophages in human specimens, we assessed the expression levels of PTGS2 and the M2 marker CD163 in the trascriptomes of a series of 178 human thyroid tissues, publicly available on GEO, and including 58 normal thyroids, 72 PTCs, 17 PDTCs and 31 ATCs. The gene discussed is CD163; the disease is thyroid tumor.