<prompt> Urinary stone formed in patients with regional bowel enteritis isCalcium oxalateUratePhosphateCysteine  <response>: Calcium oxalate stones are more common in Crohns patients regional bowel enteritisthan 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 