Below is an instruction from Human. Write a response.
    ### Instruction:
    How many people are affected by multiple endocrine neoplasia ?
    ### Response:
    Multiple endocrine neoplasia type 1 affects about 1 in 30,000 people; multiple endocrine neoplasia type 2 affects an estimated 1 in 35,000 people. Among the subtypes of type 2, type 2A is the most common form, followed by FMTC. Type 2B is relatively uncommon, accounting for about 5 percent of all cases of type 2.
    