Question

Chemical composition of renal calculi, besides uric acid is

• A. Bile salts
• B. Barium chloride
• C. Zinc sulphate
• D. Calcium oxalate

Answer 1

Answer: (D)

Calcium oxalate

Approximately 70-80% of kidney stones are composed of calcium oxalate and calcium phosphate. Of the rest, 10% are struvite, 10% of uric acid; and less than 1% are composed of cystine or are diagnosed as drug-related stones. Calcium and uric acid stones are more common in men; women have more struvite stones.

So, the correct option is 'Calcium oxalate'.