I suppose becoming bilateral is possible, but I had these tests run just several months after the laby.not even a year later and then it was discovered that the abnormal balance issues were present....I don't know Paul, I 'm really quite confused by all this...... The last hearing test I had though did show my right ear falling into the normal range of hearing... I suppose between 04 and now I have gone bilateral, but like I said those original tests were done less than a year after the surgery and it was discovered way back then... The abnormal balance signals I mean.. Thanks for thinking about my situation, I just feel so trapped by this on so many days, and oh heavens I hope I'm not bilateral............