Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Renal oncocytoma ?
    ### Response:
    How is renal oncocytoma diagnosed? A diagnosis of renal oncocytoma is often suspected based on imaging studies such as computed tomography (CT scan) and/or magnetic resonance imaging (MRI scan). However, it can be difficult to differentiate a renal oncocytoma from renal cell carcinoma based on imaging studies alone.
    