Causes of low urinary calcium include?: (A) Renal tubular acidosis, (B) Cushing's syndrome, (C) Chronic glomerulonephritis/CKD, (D) Paget's disease
Answer is C. A 1- hypercalciuria and nephrolithiasis. In Cushing syndrome- | coisol- | bone turnover and increased urinary calcium is seen. In Paget's disease of bone, urinary calcium is normal or increased In chronic glomerulonephritis, ESRD will ensue- decrease in vitamin D3, hypocalcemia and low urinary calcium. Causes of Hypocalciuria Drugs including thiazide diuretics Hypoparathyroidism, Pseudohypoparathyroidism Rickets Hypothyroidism Nephrosis/chronic kidney disease Familial hypocalciuric hypercalcemia (FHH), also known as familial benign hypercalcemia