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.
Stress testing gives your doctor information about how your heart works during physical stress. Some heart problems are easier to diagnose when your heart is working hard and beating fast. During a stress test, you exercise (walk or run on a treadmill or pedal a bicycle) to make your heart work hard and beat fast.Tests are done on your heart while you exercise. You may have arthritis or another medical problem that prevents you from exercising during a stress test.he stress part of a stress test (when you're exercising or given medicine that makes your heart work hard) usually lasts about 15 minutes or less. However, there's prep time before the test and monitoring time afterward.