Marybeth,
First, welcome to the forum and out from "lurker" status. You can learn alot by just looking at the different threads, but one generally finds themselves wanting the answers to their specific questions.. So, welcome aboard!
Second, while I didn't have much of a choice is surgery versus radiation or for the approach for that matter, based on what I've seen the approach is decided upon by BOTH you and your surgeon. Surgeon's tend to favor one approach over another and will "recommend" that approach given their own internal biases towards it. Where YOU come into play is that you can investigate the different surgical approaches and determine one based on what's important to you. For example, with Translab approach you are guaranteed to be SSD (single-sided deaf), whereas with a Retrosigmoid approach there's a theoretical chance of saving your hearing. If that's important to you, then Translab is definitely not the approach to take. Other methods such as the new endoscopic approach is less invasive and a theoretical higher chance at saving hearing, however that approach is newer so it's by default prone to a higher risk of other complications.
The doctor should tell you what approach he/she favors given the size and location of your exact tumor (along with his own experiences with multiple approaches). If you want to have a Retrosigmoid surgery, but the doctor you're seeing favors Translab, then find a reputable doctor that favors Retrosigmoid. At 1.5 cm, you have some time to make the decision that's best for you. AN's typically grown 1-2 mm per year. At 15mm, you'd have 5+ years before coming to the same size as mine or 20+ years before you'd reach the size of Jim's (estimated in both cases). The point is that you have time to decide. You shouldn't be in a rush. This isn't going to kill you overnight or anything.
If you were given options for multiple surgical approaches, then it falls back onto you to decide based on priorties, lifestyle, preferences, etc.. which approach gives you the best avenue to achieve those goals. For example, for me, hearing was of little consequence. In Jenni's mind (who was with me during every doctor visit), and she even told the doctor, so long as we were assured that she'd need to buy TWO rocking chairs when she's old, then hearing preservation was a small factor in deciding which approach to use. In fact, my surgeon switched from a Translab to Retrosigmoid with about 1 week to go before surgery after consulting with his partner over my particular case. They felt that approach gave them the best chance, the best angle, to get all of my unique tumor. It had nothing to do with hearing preservation attempts.
Everyone understands the initial shock of getting the news. Most of us understand the quest for treatment choice, and everyone understands that choice of treatment is very personal. Do what's best for you.
Regards,
Brian