My husband has had 3 three phase bones scans, 4 hip aspirations,, several MRI, and psoas lengthening, none of which revealed anything causing the pain! But I do think these doctors cover for each other, and given we had a very well known surgeon do the THR, I feel its made it more difficult to get to the bottom of it. They've ruled out nerve pain with an EMG which was normal. Im sorry to hear about your wife's journey, I hope she's doing better now!