Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Transient neonatal diabetes mellitus ?
    ### Response:
    Transient neonatal diabetes mellitus (TNDB) is a type of diabetes that appears within the first few weeks of life but is transient; affected infants go into remission within a few months, with possible relapse to permanent diabetes in adolescence or adulthood.
    