Jtd,
I have heard and read about this in a medical journal when I was researching AN treatments after it was decided that my scar tissue is really a growing tumor after all. I guess a lot of people who had surgery complained about incapacitating headaches (including myself) that surgeons took notice and starting addressing this issue. Some people, otherwise healthy, opted for radiation when possible for fear of horrible outcomes, including headaches, which caused competition among microsurgeons and radiosurgeons. Back in 1988 I don't know about anybody who were doing both and could advise you on what is better for you.
I am very pleased that no surgeon nowadays closes the incison the way I was closed in 1988 by stuffing the muscle (trapezoid) into the incision along with a metal plate. This guaranteed headaches whenever I turned my head, bent over or did any activity whatsoever because the stuffed muscle pulled on the dura! This is not to mention that my trapezoid on the AN side is smaller and the first opening is huge in comparison to what they do now!
When I was researching treatments the second time around, headaches were high on my priority list right after the facial nerve. I asked everytime what the surgeon did to avoid headaches. I heard about bone dust, cranioplasty, new metal plate and whatever else, all designed to reduce or eliminate headaches.
The headaches do indeed go away just like the article says but I feel that mine were so incapacitating that I lost what seemed to be the best, most energetic years of my life from 25 to 35 to headaches that robbed me of joy, activities, parties, etc.
I am happy for anybody who does not have headaches and hope headaches will diminish or stop altogether for those of you who have them!
Eve