Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to hereditary cerebral amyloid angiopathy ?
    ### Response:
    Mutations in the APP gene are the most common cause of hereditary cerebral amyloid angiopathy. APP gene mutations cause the Dutch, Italian, Arctic, Iowa, Flemish, and Piedmont types of this condition. Mutations in the CST3 gene cause the Icelandic type. Familial British and Danish dementia are caused by mutations in the ITM2B gene.
    