Parathyroid Scan (with Tc99m Sestamibi)
Indication
Positive biochemical tests (elevated PTH and Ca++).
Procedure
30 mCi Tc-99m Sestamibi I.V., scans of the neck and the chest at 10 min, 2 hours and 3 hours (followed with SPECT, if needed).
Attention
In some cases correlation with thyroid scan is necessary.
Parathyroid adenoma, 10 minutes post Mibi IV.
Parathyroid adenoma, 2 hours post Mibi IV. Retention of the tracer on the left side of the neck indicates presence of parathyroid adenoma.