Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) dihydropyrimidinase deficiency ?
    ### Response:
    Dihydropyrimidinase deficiency is a disorder that can cause neurological and gastrointestinal problems in some affected individuals. Other people with dihydropyrimidinase deficiency have no signs or symptoms related to the disorder, and in these individuals the condition can be diagnosed only by laboratory testing.
    