Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Hypomyelination with atrophy of basal ganglia and cerebellum ?
    ### Response:
    Hypomyelination with atrophy of basal ganglia and cerebellum (H-ABC) is a disease that affects certain parts of the brain.  Symptoms usually begin in infancy or early childhood and vary in severity; they include movement difficulties and delay in mental development or learning problems.
    