Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Permanent neonatal diabetes mellitus ?
    ### Response:
    Permanent neonatal diabetes mellitus (PNDB) is a type of diabetes that appears within the first 6 months of life and persists throughout life. Affected individuals have slow growth before birth followed by hyperglycemia, dehydration and failure to thrive in infancy.
    