Indeed, overexpression of HMGA1P6 or HMGA1P7 reduced the growth rate of the pituitary cell line AtT20 and, consistently with the role of HMGA1 in promoting cell migration, their enforced expression increases the migration of the same cells, thus indicating that HMGA1 pseudogene overexpression contributes to pituitary tumor development, thereby disclosing an additional mechanism responsible for the increased expression of HMGA1 in PAs (52). The gene discussed is HMGA1; the disease is pituitary tumor.