Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Opitz G/BBB syndrome ?
    ### Response:
    Opitz G/BBB syndrome is an inherited condition that affects several structures along the midline of the body. The most common features are wide-spaced eyes and defects of the larynx, trachea, and/or esophagus causing breathing problems and difficulty swallowing.
    