or maybe it is spelled with a DI or DY ? dhy
i've tried variations with spelling but nothing yet.
If you get close to something with spelling on Google it will ask - did you mean "---- "{ other spellings, word}

could you just ask her the name and spelling of it?
or would it upset her too much?

I checked for rare conditions, rare diseases starting with D

ahh you figured it out while i was searching? ?