Hi, @ina3 - I've merged your post asking about a connection between hyperthyroidism and chemotherapy or immunotherapy - pembrolizumab (Keytruda) specifically - with this discussion in which you've participated previously, so you can follow up with them on these developments with your dad and get their input, including how treatment for hyperthyroidism would play into the chemo/immuno regimen.

I'd invite @llwortman to return to offer her insights, and I'd also like to invite @merpreb @lady1lake @pc2018 to participate in this conversation.

What has your oncologist advised related to treatment for hyperthyroidism and how that would interact with chemo/immunotherapy?