Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Parsonage Turner syndrome ?
    ### Response:
    How is Parsonage Turner syndrome diagnosed? A diagnosis of Parsonage Turner syndrome (PTS) is often suspected based on the presence of characteristic signs and symptoms. Specialized tests may be recommended to further investigate the shoulder pain and/or muscle weakness and to rule out other conditions that can cause similar features.
    