PYY and carcinoid tumor: The first step for the diagnosis of carcinoid is the imaging: generally, patients discover the presence of ovarian masses either incidentally, during routine checkups, or because they complain of various symptoms, like abdominal or pelvic pain, bloating, discomfort, or abnormal vaginal bleeding and, depending on which substance is produced, changes in bowel habits (diarrhea in the case of carcinoid syndrome, constipation when PYY is produced) [7,24].