<prompt> Which of the following is not seen in MEN1?Posterior pituitary tumorsForegut carcinoidsParathyroid hyperplasiaPancreatic neuroendocrine tumors  <response>: Features of Multiple Endocrine Neoplasia 11q l3Intron 4 ss : Parathyroid adenoma 90- Most common presentation. Entero-pancreatic tumours- Most common is gastrinoma and least common is V.I.Poma in MEN1. Pituitary adenoma- most common is Prolactinoma and least common is non-functioning adenoma in MEN1. Associated tumours. Adrenal coical tumour. Neuroendocrine tumours- thymus, lungs Foregut derivatives include bronchus and thymus and hence choice B is correct. Lipoma Angiofibroma -Most common skin manifestation in MEN 1 Angiofibromacollagenoma Brain tumour -meningioma Pheochromocytoma 1 