The ghrelin expression (and its receptor) has also been observed in multiple endocrine and non-endocrine tumors and related cell lines in humans, such as: pituitary adenomas, thyroid follicular cancer and parathyroid adenomas, pancreatic-related endocrine tumors, oral squamous cell carcinoma, gastric carcinoids, colon cancer, renal carcinoma, bronchial carcinoid, testicular and ovarian tumors, adrenocortical tumors, prostate cancer and breast cancer[10]. The gene discussed is GHRL; the disease is breast cancer.