Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Tietze syndrome ?
    ### Response:
    Tietze syndrome is an inflammatory condition characterized by chest pain and swelling of the cartilage that joins the upper ribs to the breastbone (costochondral junction). Signs and symptoms of this condition usually develop in young adults (before age 40) and include mild to severe chest pain that may extend into the arms and/or shoulders.
    