Six mediastinal parathyroid adenomas were stained by infusing contrast agent through a catheter wedged in the feeding artery. Adenomas in the first three cases were stained unintentionally with small volumes of dilute contrast media and hypercalcemia recurred within 3 to 6 months. In the next three patients, adenomas were deliberately stained with larger doses of concentrated contrast media and these patients have remained normocalcemic from 2 to 18 months following staining. The permanency of parathyroid ablation following deliberate staining with contrast media has not been established.
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Doppman et al. (1979) studied this question.