Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Agenesis of the Corpus Callosum ?
    ### Response:
    Agenesis of the corpus callosum (ACC) is one of several disorders of the corpus callosum, the structure that connects the two hemispheres (left and right) of the brain. In ACC the corpus callosum is partially or completely absent. It is caused by a disruption of brain cell migration during fetal development.
    