I really can't advise about possible removal of cartilage though if it were my body I would be very cautious, surely some cartilage better than none? I would recommend more research on your part. I sometimes think surgeons see things in black and white, but its your body.
Sorry can't be of more help, except to say I hope to purchase this book 'the entrepreneurial patient' by Anna Thomas; all to do with being an FAI victim.
Shame Rebecca, hope you get some answers from your scan.
Miami Mike, I (partially) took your advice, and after a few days rest and core work, decided this time I would try exercise bike, though no running, as a way back into activity. Have done this x5 weekly past 2 weeks and the hip is coping I would say! Have graded up resistance so this eve did an hour burning 620 cals - not a bad work out at times pretty stiff resistance and lovely to have sweaty cardio back in my life! Pray it remains.
Have to stretch extensively before and after. The limp slightly returns after, slight twinges of pain, so not perfect.
I figure another few sessions of this to strengthen and waken up hip then I try short light running again.
My hunch- I will be able to cope with cycling (which I would take!) but am less sure of running ability, there is a general feeling of lack of nimbleness in hip.