Abstract
We report a case of ectopic parathyroid adenoma in the upper mediastinum. A 51-year-old Japanese woman presented hypercalcemia and repeated pancreatitis. The serum parathyroid hormone level was high and Tc-99m methoxyibutylisonitrile scintigraphy showed an abnormal hot-spot in the left side of the upper mediastinum. Therefore, an ectopic parathyroid adenoma was diagnosed. A dark red tumor of 18 mm in diameter located in the thymus was resected under general anesthesia. Postoperative condition was good, with the levels of serum calcium and parathyroid hormone maintained within normal limits. This case indicates that Tc-99m MIBI scintigraphy is highly recommended for detecting parathyroid tumor in an ectopic area.
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