Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Antisynthetase syndrome ?
    ### Response:
    How is antisynthetase syndrome diagnosed? A diagnosis of antisynthetase syndrome is often suspected based on the presence of characteristic signs and symptoms once other conditions that cause similar features have been ruled out. Additional testing can then be ordered to confirm the diagnosis, determine the severity of the condition, and inform treatment.
    