Small Parathyroid Adenoma Associated With Hyperactive Bone Demonstrated by Tc-99m MIBI Scintiscan

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A 58-year-old man patient with a history of hyperparathyroidism with recurrent renal stones was evaluated by ultrasonography of the neck and Tc-99m methoxy isobutyl isonitrile (MIBI) scintigraphy. Both imaging modalities correctly visualized a parathyroid adenoma. Increased Tc-99m MIBI uptake was noted in the sternum, clavicle, and shoulders. These findings are the result of hyperactive bone turnover rate occurring secondary to the hyperparathyroidism.

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