PITX1 and cancer: Endocrine system development and cancer growth-related ceRNA regulation are found in TNBC; HOXA5, SCAPER, PAK6, PBX1, PITX1, and ALOX15B are the relevant genes involved; and hsa-miR-296-5p, hsa-miR-185-5p, hsa-miR-7851-3p, hsa-miR-3187-3p, and hsa-miR-10396b-5p are the relevant miRNAs involved.