Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) malignant migrating partial seizures of infancy ?
    ### Response:
    Malignant migrating partial seizures of infancy (MMPSI) is a severe form of epilepsy that begins very early in life. Recurrent seizures begin before the age of 6 months but commonly start within a few weeks of birth. The seizures do not respond well to treatment.
    