Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Familial Mediterranean fever ?
    ### Response:
    Familial Mediterranean fever (FMF) is an inherited condition characterized by episodes of painful inflammation of the abdominal lining (peritonitis),  lining surrounding the lungs (pleurisy), and joints (arthralgia and occasionally arthritis). These episodes are often accompanied by fever and sometimes a characteristic ankle rash.
    