Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Cowden syndrome ?
    ### Response:
    What are the signs and symptoms of Cowden syndrome? Cowden syndrome is characterized primarily by multiple, noncancerous growths (called hamartomas) on various parts of the body. Approximately 99% of people affected by Cowden syndrome will have benign growths on the skin and/or in the mouth by the third decade of life.
    