Multiple endocrine neoplasia type 1 ATR. The exact function of MEN1 and the protein, menin, produced by this gene is not known, but following the inheritance rules of the "two-hit hypothesis" indicates that it acts as a tumor suppressor. In a diagnostic workup individuals with a combination of endocrine neoplasias suggestive of the "MEN1 syndrome" are recommended to have a mutational analysis of the MEN1 gene if additional diagnostic criteria are sufficiently met, mainly including: Multiple endocrine neoplasia or MEN is part of a group of disorders that affect the body's network of hormone-producing glands (the endocrine system). Hormones are chemical messengers that travel through
Gastric glands the fundus and body of the stomach. They are simple almost straight tubes, two or more of which open into a single duct. "Oxyntic" means acid-secreting and they secrete hydrochloric acid (HCl) and intrinsic factor. The pyloric glands are located in the antrum of the pylorus. They secrete gastrin produced by their G cells. There are millions of gastric pits in the gastric mucosa and their necessary narrowness determines the tubular form of the gastric gland. More than one tube allows for the accommodation of more than one cell type. The form of each gastric gland is similar; they are