Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Congenital sucrase-isomaltase deficiency ?
    ### Response:
    Congenital sucrase-isomaltase deficiency (CSID) is a genetic condition that affects a person's ability to digest certain sugars. People with this condition cannot break down the sugars sucrose (a sugar found in fruits, and also known as table sugar) and maltose (the sugar found in grains).
    