I'm still in the early stages - just 3 weeks out from CK. I noticed hearing problems last fall, and was diagnosed with mixed hearing loss - sensory-neural loss (probably from AN), and conductive or bone loss from otosclerosis or previous injury. We didn't think too much of it until I had an episode of a couple days acute vertigo, which resulted in MRI and AN diagnosis. My balance gradually improved from January to March. Like Tumbleweed, I had a rocky initial period after CK, maybe due to steroids. Seemed like CK did set me back slightly with regard to balance. Someone else on this forum called it "floaty" feelings, or more like being in a boat on water, not spinning vertigo.
Happy to report that I'm back to pretty much 100% normal in every way at this point, no changes in hearing (for better or worse). So far, so good - I told my husband that, if CK stops the tumor growth, they will have made a real believer out of me. From what I've been told, there's a risk for at least several months after CK that the tumor swells and causes further symptoms, but no sign of that so far.