The damage was discovered after. I don't have a link to the bone scan report itself, but it gave a general timeframe of when the damage most likely occurred (judging by how it had healed). But if I discovered that my wife showed signs of having received some sort of serious trauma, I sure think I'd want some investigation into it.
Terri's bone scan:
http://www.ginzell.net/terri_schiavo_bone_scan.html
Terri's 1990 medical report:
http://www.hospicepatients.org/terri-schiavo-exam-1990.pdf