It sounds like (and I am going out on a limb here) like the 'abnormal tissue' may have been there for some time and my gues is that if it has not caused you a problem up to now, I guess its not likely to cause you a problem in the immediate future. But as I said in my previous post, everyone is different so there is no way of really guaranteeing it. Even if you did have a seizure and were diagnosed as having a seizure disorder such as Epilepsy, there is no reason why you shouldnt go to college. Dont let seizures (or the fear of them) hold you back from following your dreams / living your life.
If it helps you, keep talking to us here on HW. We are always here and will help you as best we can.
Darren