Certainly an intriguing subject matter.
This piece is certainly unusual in my books. I like what you've done with the textures in this image. It reminds me a bit of oil paints or a water based medium of some sort. Was this done using Photoshop filters at all? The image seems to have a bit of a artistic filter feel to it, which in this case is nice.
Overall, you did a nice job on this. Although, the eyes could perhaps use a little touching up to bring them out a little more from the background.