Descriptor card, but answer is Grandparent?

Is there a way to change the target answer for backwards descriptor cards to be the grandparent of a rem instead of the immediate parent?
For instance, I’d like to target “Giant Cell Tumor” in this example

To circumvent this issue I’ve been making the cards say something like “appearance on MRII;;” but I was hoping to organize my notes a little better with the screenshoted hierarchy.

I’m afraid there is no way - descriptors are only concerned with their direct parents.
EDIT: Nevermind, I was wrong, Michael_Regan is right - descriptors look to a concept parent, skipping other descriptors in the hierarchy. Of course, a hierarchy of descriptors may not be terribly useful.

Make Giant Cell Tumor a concept, and everything afterwards a descriptor. That will allow you to hide Giant Cell Tumor