Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Olivopontocerebellar atrophy ?
    ### Response:
    How is olivopontocerebellar atrophy diagnosed? A diagnosis of olivopontocerebellar atrophy (OPCA) may be based on a thorough medical exam; the presence of signs and symptoms; imaging studies; various laboratory tests; and an evaluation of the family history.
    