Role of Microvascular Density in Nonlocalizing Parathyroid Sestamibi Scans

Objectives: Sestamibi scans for localization of abnormal parathyroid glands in patients with hyperparathyroidism are widely used at many institutions. Minimally invasive parathyroid surgery demands accurate preoperative localization imaging; however, nonlocalizing sestamibi scans occur in 15% of patients with primary hyperparathyroidism. It remains unknown why some sestamibi scans fail to localize. We hypothesize that an increase in microvascular density (MVD) within an adenoma will result in rapid tracer washout and a subsequent nonlocalizing scan. This study investigates the role of MVD in sestamibi localization.

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