1 Some brain cancers occur when one type of cell transforms from its normal characteristics. 2  Once transformed, the cells grow and multiply in abnormal ways. 3  As these abnormal cells grow, they become a mass, or tumor. 4  The brain tumors that result are called primary brain tumors because they originate in the brain.etastatic brain tumors are made of cancerous cells from a tumor elsewhere in the body. The cells spread to the brain from another tumor in a process called metastasis. This is the most common type of brain tumor.
How Long Does a Stress Test Take? While the exercise stress test itself usually takes around 10 or 15 minutes, part one of the test takes about 30 or 45 minutes total. Dr. Willke suggests blocking off most of your morning, because you will need to go in for follow-up photos about two hours later, for the second part of the test.
The doctor will look at and listen to the electrical signals that travel from the needle to the EMG machine. The doctor then reads these signals. How long will these tests take? The tests usually take 40 to 90 minutes. You can do any of your normal activities, like eating, driving, and exercising, before the tests. You also can do your normal activities after the tests. There are no lasting side effects from the tests.