Urinary stone formed in patients with regional bowel enteritis is
Calcium oxalate stones are more common in Crohn's patients (regional bowel enteritis)than in the general population because of fat malabsorption. Fat binds to calcium, leaving oxalate free to be absorbed leading to hyperoxaluria and deposition in the kidney, where it can form into stones ref : Bailey 27th edition , chapter 76 , 69 , pg no :- 1406 , 1244
Calcium oxalate
Urate
Phosphate
Cysteine
Urology