Gene expression of the ghrelin receptor was identified in pituitary adenomas, neoplastic thyroid tissue, breast cancer, prostate cancer cell lines, and ovarian tumors (Gaytan et al., 2005; Korbonits et al., 2001; Barlier et al., 1999; Skinner et al., 1998; Korbonits et al., 1998; Adams et al., 1998; Kim et al., 2001; Volante et al., 2003; Cassoni et al., 2001; Cassoni et al., 2004; Jeffery et al., 2002). Here, GHSR is linked to pituitary gland adenoma.