Biopsies CAN detect inflammation even when not visible to the colonoscope (depends on how good the pathologist is whether he misses it or not - and if the gastro took the biopsy in the right spot) BUT there is NO TEST for adhesions except an exploratory surgery.
Good luck w/the pred. Much as I hated to I went thru two short dosing regiments in Jan 08 and I'm back in symptomatic remission. (I also re-started the Pentasa I'd quit taking as insurance. Thank God, I am one who DOES respond well to Pentasa!).
Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.