This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
Type of renal stone formed in a patient with regional enteritis 
Select and explain. 
A. Calcium oxalate, B. Cysteine, C. Struvite, D. Urate
A: Calcium oxalate
Answer: A: Calcium oxalate 
Explanation: Ans. (a) Calcium oxalate* Calcium oxalate kidney stones are most common in CD.* Cholesterol type gallstones are also most common in CD.