This study is performed for the evaluation of a possible parathyroid adenoma. The parathyroids are four glands in the neck which help to regulate calcium metabolism. A parathyroid adenoma is a benign tumor of the parathyroid gland. This tumor is the most common cause of hyperparathyroidism, which causes elevated levels of calcium in the blood (hypercalcemia).
You will be given an injection of a radioactive tracer into a vein in your arm. Ninety minutes worth of images of your parathyroid glands will take place immediately following the injection, and again three hours after the injection. You may leave in between the first and second set of images.