It reminds me of Annie Leibovitz's nudes she did for the Pirelli tire company's calendar. They were dark and underexposed, but you could se the lines and they were very subtle photographs despite being dark. The only difference between those and this is that they had a blue hue to them and weren't so warm.
I really like the composition. I also like the curve of the spine. I wonder if getting the flash a bit lower for more oblique lighting and moving it a bit closer for more falloff would better showcase the contour of the spine and the definition up around the shoulders. Again, great comp.