Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Hydrocephalus due to congenital stenosis of aqueduct of sylvius ?
    ### Response:
    What are the signs and symptoms of Hydrocephalus due to congenital stenosis of aqueduct of sylvius? Males with hydrocephalus due to congenital stenosis of aqueduct of sylvius (HSAS) are typically born with severe hydrocephalus and adducted thumbs (bent towards the palm).
    