I grow Epipactus gigantea, a west coast native. I believe Epipactis helleborine is introduced but I'm sure they are basically the same. I have never seen a variegated Epipactus but there's always a first.
Maybe there are some variegated ones that I don't know about. But maybe you have something unique. First, wait and see what the offshoots from this bulb do. If they continue to be variegated, that's a good thing. If they change back to green, you have a sport (a genetic abnormality that is not going to be repeated soon).
Next, move this particular plant to a different location (just a couple feet will do). See if it continues to be variegated. Lastly, move it to a competely new location. If you can change the plant by moving it, its not unique (that proves it was some condition of its growing environment that made it variegated). If it continues to be variegated, you have something new.
Sounds like a great scientific experiment (that will occupy you for the next few years) to me.
Have fun!
Daisy
