Hi i have got brain tumor (meningioma)frontal lob size 18.7mm , how much %the operation will be sucessful ?

Highly successful: Meningiomas are benign tumors, location is safe , access is easy , success rate is very high and when completely removed recurrence is rare. Consult the neurosurgeon

Depends : This depends on your definition of success. It is probably a near 100% chance that the surgery can be done safely and that you will have no neurologic sequelae with a small convexity frontal lobe tumor. The risks of infection are about 3-5%. The risk of recurrence depends on the extent of resection and the pathology of the tumor. Not all meningiomas are the same-some are atypical, some aggressive.

Get a consult: With a neurosurgeon. It may actually be wisest to just watch it if you don't have any symptoms as this may simply not grow at all and you may live to the end of your days without the risks of a surgery. One really needs longitudinal imaging and an exam to say more.. Some patients cannot have surgery, etc., so radiation can be useful too.