Lamplight ~
Hello and welcome to the ANA website forums.
I'm sorry to learn of your AN surgery postponement but if its any reassurance, I was diagnosed with a 4.5 cm AN in late May, 2006. I had numerous symptoms (balance problems, loss of taste, etc) and the very experienced neurosurgeon I engaged wanted to perform debulking surgery within a week of my initial consult with him, he was that concerned about the size of the tumor. Unfortunately, my pre-op testing discovered a large unexplained 'mass' on my liver which was thought to be cancer. Although no one actually said that dreaded word, the inference was unmistakable. My neurosurgeon, suspecting the worst, apologetically canceled my AN surgery. I soon had a biopsy performed to determine if the 'mass' was malignant. It wasn't. The mysterious 'mass' turned out to be a hepatic hemangioma (a mass of blood vessels in the liver) which is not terribly uncommon and, because I was asymptomatic, does not require treatment of any kind. My AN debulking surgery was re-scheduled for approximately ten days later. It was performed on time and went very well with no real complications. My symptoms disappeared immediately following the surgery. I later underwent FSR to destroy what remained of the AN. That seems to have been effective. Today, I'm pretty much back to normal.
Like you, facial nerve preservation was my foremost concern, pre-op. My neurosurgeon (with decades of AN removal experience) advised that I undergo a tumor de-bulking procedure, which 'guts' the AN (my 4.5 cm AN was reduced to approximately 2.5 cm) and cuts off it's blood supply. This procedure also avoids disturbing the facial nerve any more than necessary. It worked for me; practically no post-op facial issues. The radiation (90 days later) is intended to destroy the remaining tumor's DNA and effectively 'kill' it. So far, so good.
Every AN patient is unique and I can only offer you my experience but if your symptoms haven't drastically increased, I doubt that a 30-day wait will have a significantly negative impact on your cranial nerves being impinged by the AN.
Jim