Wow! I am not an aviation medical examiner, but in general surgical ( or quack as some of you persist with) terms, this sounds just bizarre. If you have no sign of recurrence, I would love to know in what way they think you are a flight risk!!!!!
Even if you had a recurrence, there would be more danger from suicide than illness in flight ( sorry to be blunt about this).
Good luck on this. I would like to see their argument on this disease.