Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Congenital sucrase-isomaltase deficiency ?
    ### Response:
    How is congenital sucrase-isomaltase deficiency (CSID) diagnosed? CSID can be diagnosed through clinical evaluation, detailed patient history, and tolerance lab tests. Blood tests can be done to look for a flat serum glucose curve after patients are given a dose of sucrose.
    