Ghrelin stimulates proliferation in a range of cancer cells, including human hepatoma (12), human erythroleukemia (13), adrenocortical carcinoma (14), pancreatic adenocarcinoma (15), colorectal cancer (16), choriocarcinoma (17), prostate cancer (18), breast cancer (19), and endometrial cancer cell lines (20). The gene discussed is GHRL; the disease is prostate carcinoma.