Saskia. I have been preparing this option for a while now and some issues played into my hands. I actually did have voice prolems for a while now. Speaking in my present voice for the past 15 years strained my voice over time and I developed issues. I have to cough and clear my throat a lot, I sometimes sound raspy. And I kind of pointed towards that at work, that I do have these issues, cursing about it and using herbal throat pills a lot. Then I told them I need to go to a voice exam, which was actually true. Then i told them the rsult of the voice exam which was that my vocal chords do not come together in some parts of the voicebox. I told them that I got a prescription for voice training but if that doe snot work, they may have to do a surgical correction by closing that gap in the vocal chords to allow me to speak again without straining. Now if I ever do this procedure, they even know exactly what will be done and its not a secret at all. I can even ask for being off work for a while to get this done and choose with them a date that fits the no-speaking period. The only thing they dont know is basically what is the true background of me bein in this situation. I admit, it was a bit things falling into my lap there, as I expected some other issues with my voice or even none at all, but they basically found somethig that can easily explain why I am getting exactly the procedure done at Yesons.
So maybe you could pull off something similar?