Living With Thyroid Cancer: Voice Changes While some temporary voice changes due to swelling post-operatively is normal, roughly 1-2% of thyroidectomy patients experience some form of permanent voice change. While the chances are rare, it's important patients are informed of all surgical risks. Professionals discuss these risks and the potential changes involved, as well as things patients can do to minimize long term damage after their surgery. Featuring: David Myssiorek, MD (New York University School of Medicine) and Tracy S. Wang, MD (Medical College of Wisconsin in Milwaukee).