Hi. I had one of my vocal chords paralyzed because of the spreading of cancer in my lymph nodes. Like you, I had the injection gel to tighten that side of my cord so I could swallow more easily and also speak more easily. I was not able to have the injection put in during my doctor's office and had to have this done as a surgery. It took about two weeks for the surgery to feel better. My doctor says it will last about six months. It won't be permanent. It's possible, but not likely, that the lymph nodes won't be pressing as hard against the cord but I have the sense I will either have to have the injection gel again or a larger surgery that would be permanent.