MEN1 and gastrin-producing neuroendocrine tumor: Originally described by Wermer in 1967, who described a combination of gastrinoma, hyperparathyroidism and pituitary adenomas in a kindred [17], MEN1 is now know to be associated with around twenty endocrine and non-endocrine tumours, most frequently affecting the parathyroids, pituitary, pancreas, duodenum, adrenal cortex and more rarely lungs/thymic tissue [18].