What tests would you do for 58-yr old female w/ confusion (diabetes, asthma, anemia, apnea, spider cyst on brain). Had mri, ct, spinal tap, ekg.?

History and Physical. Start with complete h+p and blood tests. Would especially want to know: thyroid function tests, b12, liver function tests, kidney function tests, etc.
Labs . Sodium, calcium, urea, ammonia, illicit and licit drugs, urinalysis, urine, blood, CSF cultures, rarely heavy metals, arsenic, aspirin, etc.