If there is a suspicion that the tumor is not growing and it is not causing symptoms, then watching it is reasonable. It is extremely rare for a benign meningioma to grow fast. Surgery is always an option. The pros/cons depend on the individual patient and tumor, and can also depend on the patient’s personality and their attitude towards the tumor. Some patients cannot bear the thought of having a tumor in their brain and want it out regardless of whether its symptomatic.