Mediastinal parathyroid adenoma can cause persistent hyperparathyroidism with hypercalcemia. Accurately locating and removing the adenoma, using an appropriate, is very dufficult. A 52-year-old woman suffered from frequent attacks of renal colic and persistent hypercalcemia. Even after ureteroscopy with electrohydraulic lithotripsy and double J catheter drainage, the renal colic persisted. The laboratory study disclosed abnormally high calcium and parathyroid hormone levels in the blood. A computed tomography (CT) scan of the chest showed a soft tissue nodule located at the aorto-pulmonary window. Technetium-99m-sestamibi scintigraphy demonstrated significantly increased radioactivity before the tracheal carina. The mediastinal parathyroid adenoma was diagnosed and the tumor was removed smoothly with a left-side thoracotomy. After operation, both blood calcium and parathyroid hormone (PTH) levels were back to normal. We present this successfully treated case and discuss how to precisely locate and approach a parathyroid adenoma descending into the mediastium.
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