Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Vici syndrome ?
    ### Response:
    Vici syndrome is a multisystem disorder characterized by agenesis (failure to develop) of the corpus callosum, cataracts , hypopigmentation of the eyes and hair, cardiomyopathy, and combined immunodeficiency. Hearing loss, seizures, and delayed motor development have also been reported.
    