Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Mitochondrial neurogastrointestinal encephalopathy syndrome ?
    ### Response:
    What are the signs and symptoms of Mitochondrial neurogastrointestinal encephalopathy syndrome? The Human Phenotype Ontology provides the following list of signs and symptoms for Mitochondrial neurogastrointestinal encephalopathy syndrome. If the information is available, the table below includes how often the symptom is seen in people with this condition.
    