Are meningiomas as serious as brain cancer?

Usually not.: Meningiomas are almost always benign, which means that they rarely spread elsewhere or even grow much at all. In fact, it is commonly the case that meningiomas are found during autopsies after someone has already passed away, suggesting that these meningiomas didn't really have an effect one way or the other. Some brain cancers, on the other hand, commonly spread, which makes them more serious.

No: No. Meningiomas rarely become cancerous and tend to be found incidently at autopsy. Rarely, really big ones can cause increased intracranial pressure and have to be surgically removed. They due tend to cause seizures due to irritation on the surface of the brain.

In general no: Meningiomas are usually benign brain tumors that used to be found on autopsy and now can be seen on MRI studies as incidental findings. If you are diagnosed with a meningioma on MRI the study should be repeated to be sure it is not growing. Benign meningiomas grow very slowly. It's always best to see a Neurological Surgeon so they can follow you. Good luck!