Acromegaly is a condition where a pituitary tumor secretes excessive amounts of growth hormone. Patients with acromegaly have been found to have a higher prevalence of kidney stones, urinary calcium, and serum calcium when compared to normal adults. The reason for this is unknown but a suggested mechanism is that growth hormone stimulates the production of calcitriol or PTH. If this is true, then treatment of acromegaly resulting in lower growth hormone levels should also result in lower blood and urine calcium levels. The investigators want to see if patients with acromegaly have high calcitriol, and vitamin D binding protein, or PTH levels and see if they change after treatment of the condition. The investigators also want to assess the amount of calcium in the urine, before and after treatment.