Sometimes, as mentioned before, these tumors can produce different hormones: a case report from 2014 describes a patient with Cushing’s syndrome, which turned out to be due to ectopic ACTH secretion from a carcinoid tumor within an ovarian mature teratoma; 1 year after the teratoma and the carcinoid tumor were removed, the syndrome had disappeared and the patient was permanently cured [25]. This evidence concerns the gene POMC and teratoma.