MEN1 and breast cancer: Other MEN1-associated tumors include thymus and lung neuroendocrine tumors (NETs), type 2 gastric NETs, adrenocortical tumors, pheochromocytomas, facial angiofibromas, collagenomas, meningiomas, ependymomas, lipomas, carcinoid tumors, breast cancer, and an increased risk of developing breast cancer in female patients [26,27,28,29,30,31].