HOXD8 and thyroid gland papillary carcinoma: HOXA-AS2 regulated the HOXA-AS2/miR-520a-3p/homeobox D8 and mitogen-activated protein kinase kinase kinase 2 axis in non-small lung cancer 46, and the miR-15a-5p/homeobox A3 (HOXA3) axis in papillary thyroid cancer 44.