<prompt> Answer this question truthfullyCan you provide a brief summary of multiple endocrine neoplasia type 2?  <response>: <reason> Multiple endocrine neoplasia type 2 must be differentiated from other hereditary tumors such as medullary thyroid carcinoma, C-cell hyperplasia pheochromocytoma, von Hippel Lindau syndrome, hereditary paraganglioma - pheochromocytoma, polycythemia and paraganglioma pheochromocytoma syndrome, neurofibromatosis type 1, and multiple endocrine neoplasia type 1 MEN 1. 