Do you routinely check a TSH level in patients with recurrent kidney stones who have hypercalciuria of unknown cause?  

No. Although hyperthyroidism is a reported cause of hypercalcemia and hypercalciuria, it must be very rare cause of nephrolithiasis. I suspect the patient would be obviously hyperthyroid on examination. Hyperparathyroidism is a much more common cause of kidney stones. In my practice, if the stone an...