AIP and growth hormone-producing pituitary gland adenoma: Patients with prolactinomas can also harbor AIP mutations, although significantly less frequently than somatotrophinomas [Tichomirowa et al., 2011; Cazabat et al., 2012; Cuny et al., 2013; Preda et al., 2014]; the frequency of R304* in Irish patients with prolactinomas remains to be determined.