Carol: I am uncertain if you were addressing me personally when you wrote "Excuse me for asking...but have you had any of these surgical procedures for your TN or do you have ATN." But I'll try to address your question.
I am the spouse of a TN/ATN patient whose combination of Typical and Atypical symptoms presented first in 1996. She has since developed pain of differing types on both sides of her face. Carbamazepine (Tegretol) was successful in managing the pain when we learned that she had this disorder. She was later assisted by a neurologist at her own initiative in 2002 to transition from Tegretol to Neurontin. Her intention was to reduce the burden on her liver (Carbamazepine is metabolized in the liver, and Neurontin is not). She has had relatively few side effects from a stable dose of 2700 mg/day (800 mg with meals, 300 mg at bed time), other than occasional word-finding difficulty. She hasn't had any of the surgeries. She has also been through Post Herpetic Neuralgia in a case of Shingles. Treatment with anti-virals and Neurontin was successful in putting the PHN back into remission, though she continues to deal with the pain she had before Shingles.
I have also been active as a patient advocate and online research analyst for chronic facial pain patients since 1996. I was webmaster for the TN Association for three years. I have corresponded with well over 3,000 pain patients, family members and physicians during that time, and published on the Web in multiple venues, including Allegheny General Hospital, Web MD, and a now-defunct website called "facepain.com" (the latter with Cindy Fleishman, a long-term chronic face pain patient). I wrote almost all of the Wikipedia entry for Atypical Trigeminal Neuralgia. I have researched and written a lot of the information materials indexed from our page menus here at Living With TN. Thus I believe I have some credible understanding of the state of medical knowledge and patient experience in this disorder.
From that background, I offer the following assertions that center on the current thread:
(1) Peripheral neurosurgery - of which RF Rhizotomy is one variety - may be an appropriate step for TN patients who have been unsuccessful in finding a medication solution and whose quality of life has been deeply impacted by untenable levels of pain.
(2) Prevailing medical opinion is that the destructive procedures (generally, RF Rhizotomy, Balloon Compression, Glycerol Rhizotomy or Gamma Knife / Cyber Knife), are significantly less effective for Atypical TN than for Typical TN, and may indeed add damage to an already damaged nerve. I've heard several neurosurgeons state that they would not use any of these procedures as anything more than a last-chance high risk attempt to control pain that is otherwise uncontrollable. A few neurosurgeons regard Gamma Knife as outright "barbaric" in the residual damage that it can create in adhesion to the nerve near the target zone.
(3) That being said, the consensus is that MVD is the "gold standard of practice" against which all other procedures are compared for surgical management of TN. Some neurosurgeons won't do MVD with ATN patients either. Others regard the procedure as appropriate for anyone who has a component of trigeminal pain which presents as Typical TN, even if ATN symptoms are present and dominate the patient's pain experience.
(4) Medical opinion is almost universal that neurectomy - the total severing of the nerve or of a downstream branch of the nerve - is neither medically appropriate nor safe for TN patients of either type. The risk of deafferentiation pain or anesthesia dolorosa is significantly higher with neurectomy than with any of the other procedures used against TN.
(5) Even with MVD where there is MRI evidence of a vascular compression before the procedure, there are risks, some of which are significant. Small numbers of patients experience CNS fluid leaks, meningitis, hearing loss, loss of blink reflex (with a risk of corneal ulcers), persistent and bothersome numbness, or anesthesia dolorosa. The highest reported statistic I have seen on AD in reaction to an MVD have been on the order of 4% in retrospective reviews of over 1500 patients. If other members have seen medical literature sources with a higher number, please forward references.
(6) Overshadowing all of these trends, is a remarkable and persistent lack of consensus among many practitioners in the medical community. Some practitioners persist in the barbaric practice of labeling trigeminal pain as a potentially "psychogenic" disorder, despite a total lack of evidence that any such medical entity actually exists. Everybody seems to be wrestling with the need to differentiate between TN, Trigeminal neuropathic pain, various forms of headache, and symptoms of TMJ disorder. Treatment options are different for these variants on face pain, so diagnostic labels are important. A similar lack of consensus prevails with regard to measures of success in surgery, rendering comparison of study results difficult or impossible. Among researchers in evidence-based medicine, it is frequent to hear the phrases "evidence is weak" or "quality of investigation was low".
(6) Some practitioners and no few patients accuse others of "fudging their numbers to make themselves look good." This is a hard accusation to refute. But as one who has read possibly hundreds of papers in this area of medical literature, my personal belief is that such occurrences are an exception rather than the rule. That doesn't mean that financial self interest or simple human arrogance don't operate among doctors. They certainly do. But I would regard it as a profound mistake to project from the bad experiences of a few people to indict an entire profession with distrust.
This is a basis for my consistent emphasis of the need for patients to form a teaming relationship with doctors who propose to treat them. Do your own research, and bring it back to your doctor for assessment and reaction. If the doctor refuses to work with you or criticizes your Internet research as a useless waste of time, then find somebody else, drop these neanderthals like a hot rock and send letters of complaint to every hospital where they have admission privileges. They shouldn't be in practice.
Regards and best,
R.A. "Red" Lawhern, Ph.D.
Resident Research Analyst, LwTN.