Classification
Before gene testing was available, the type and location of tumors determined which type of MEN2 a person had. Gene testing now allows a diagnosis before tumors or symptoms develop.
A table in the multiple endocrine neoplasia article compares the various MEN syndromes. MEN2 and MEN1 are distinct conditions, despite their similar names. MEN2 includes MEN2A, MEN2B and familial medullary thyroid cancer.
The common feature among the three sub-types of MEN2 is a high propensity to develop medullary thyroid carcinoma.
Read more about this topic: Multiple Endocrine Neoplasia Type 2