Stagged gamma knife surgery

Did or does anyone require stagged gamma knife surgery? Was it successful at obliterating the lesion?

I had gamma knife surgery in May and the MRI I had 6 months later showed that the AVM had decreased in size by almost 25%. I feel a bit dumb for asking but what is stagged gamma knife surgery? I suppose since I don’t know what it is that means I didn’t have it? LOL.
I am looking for others who have had gamma knife surgery so that I can hear what kind of progress they made from one follow up MRI to the next. If anyone reading this is in that situation, please leave me a message. Thanks! Christine W.

I think that’s great progress! I was at 2 years before they could detect a measurable change. I’ve not heard the term “stagged” before.