Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Multiple endocrine neoplasia type 2A ?
    ### Response:
    What are the signs and symptoms of Multiple endocrine neoplasia type 2A? The Human Phenotype Ontology provides the following list of signs and symptoms for Multiple endocrine neoplasia type 2A. If the information is available, the table below includes how often the symptom is seen in people with this condition.
    