The diagnosis of ataxia in cancer patients involves a comprehensive evaluation that includes a detailed medical history, physical examination, and a series of diagnostic tests. Imaging studies such as MRI or CT scans are often used to identify any structural abnormalities in the brain or spinal cord. Additional tests such as lumbar puncture, blood tests, and electromyography (EMG) may be conducted to assess the underlying cause of ataxia and evaluate the extent of neurological involvement.