Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Hemophagocytic lymphohistiocytosis, familial, 4 ?
    ### Response:
    What are the signs and symptoms of Hemophagocytic lymphohistiocytosis, familial, 4? The Human Phenotype Ontology provides the following list of signs and symptoms for Hemophagocytic lymphohistiocytosis, familial, 4. If the information is available, the table below includes how often the symptom is seen in people with this condition.
    