Diagnosis often begins with a medical history. Your doctor will ask about your symptoms, health habits, and past illnesses and treatments. He or she will also do a neurological exam to check your
Your doctor may also order one of these imaging tests:
If a brain tumor is suspected to be a secondary cancer, imaging tests also may be done of other organs.
Your doctor may also want to do a lumbar puncture (spinal tap). During this test, spinal fluid is taken from the lower back with a needle. The fluid can be checked for signs of infection or cancer cells.
In rare cases, doctors may want to remove a small piece of tumor tissue before diagnosing the cancer. This is called a biopsy.
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