I never heard of a biopsy causing someone to lose their voice. Did the doctor explain how this happened? Is one vocal fold paralyzed? If so, they might be able to use Botox to plump up the other vocal fold so it meets the paralyses one and give you a voice again. It could also be something unrelated to the biopsy causing the voice issue…. Maybe it’s spastic dysphonia? You might want to ask to be referred to a Speech and Language Pathologist ( SLP) who specializes in voice disorders. An SLP might be able to work with you to help restore your voice. There are a lot of exercises that can help with voice issues. Good luck!