Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Lesch-Nyhan syndrome ?
    ### Response:
    Lesch-Nyhan syndrome is a condition that occurs almost exclusively in males. It is characterized by neurological and behavioral abnormalities and the overproduction of uric acid. Uric acid is a waste product of normal chemical processes and is found in blood and urine.
    