Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) hereditary cerebral amyloid angiopathy ?
    ### Response:
    Hereditary cerebral amyloid angiopathy is a condition that can cause a progressive loss of intellectual function (dementia), stroke, and other neurological problems starting in mid-adulthood. Due to neurological decline, this condition is typically fatal in one's sixties, although there is variation depending on the severity of the signs and symptoms.
    