Secondary hyperparathyroidism from chronic renal failure often requires a parathyroidectomy for correction. A successful parathyroidectomy often relies upon localization of all parathyroid tumors. Although most of the tumors are localized during a neck exploration, preoperative localization studies can help identify ectopic and supernumerary tumors. Three of the most common localization studies are radionuclide imaging, ultrasound, and CT scanning. Utility of these studies is strongly dependent on local institutional practice.
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