PIK3CD and thyroid gland undifferentiated (anaplastic) carcinoma: In addition, in anaplastic thyroid cancer (ATC) cells, miR‐125b can affect the migration and invasion of ATC cells by directly targeting the phosphoinositide 3‐kinase catalytic subunit delta (PIK3CD) to repress PI3K, p‐Akt and p‐mTOR.47