Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Aicardi syndrome ?
    ### Response:
    Aicardi syndrome is a disorder that occurs almost exclusively in females. It is characterized by three main features that occur together in most affected individuals. People with Aicardi syndrome have absent or underdeveloped tissue connecting the left and right halves of the brain (agenesis or dysgenesis of the corpus callosum).
    