@Mammmood - I think that the definition of meningioma implies that it is benign by nature.
However, according to my doctor, any condition – even a benign one – can become dangerous if left untreated for a long period of time.
What really concerns me is that some symptoms, like seizures for example, do not necessarily raise alarm bells. Some people have learned to live with epilepsy through the use of medication.
Therefore it’s quite possible that they could be living with a potentially fatal tumor condition without knowing it, unless something serious forces them to get an MRI scan.