Fact #3
Since they never travel into the bloodstream, primary brain tumors cannot be detected by a blood test. This makes an MRI or CT Scan the most efficient tool for diagnosing brain tumors.
There is a great difference in the way primary and secondary tumors are diagnosed. Since primary brain tumors do not travel into the bloodstream, they cannot be detected by a blood test. Conversely, secondary (metastatic) brain tumors are most often diagnosed with a blood test first (as the result of symptoms elsewhere in the body) and then confirmed with MRI or CT Scan later. With that in mind, it is recommended that an MRI or CT Scan be conducted promptly if a brain tumor is suspected.
