Radiology, Vol 197, 627-633, Copyright © 1995 by Radiological Society of North America

ARTICLES

Hyperparathyroidism in high-risk surgical patients: evaluation with double-phase technetium-99m sestamibi imaging

VS Lee, RH Wilkinson Jr, GS Leight Jr, AC Coogan and RE Coleman
Department of Radiology, Duke University Medical Center, Durham, NC 27710, USA.

PURPOSE: To evaluate the accuracy of technetium-99m sestamibi as a single agent in the detection and localization of hyperfunctioning parathyroid tissue in patients who underwent prior neck exploration or who otherwise are high surgical risks. MATERIALS AND METHODS: Thirty- nine patients with hyperparathyroidism underwent 40 double-phase Tc-99m sestamibi studies. Histopathologic correlation was obtained for all studies. RESULTS: Thirty patients had solitary adenomas, and nine had hyperplastic glands. One developed recurrent hypercalcemia after five- gland resection and underwent repeat imaging and operation. Double- phase sestamibi imaging prospectively enabled localization of 46 (77%) of 60 abnormal glands. Twenty-eight (93%) of 30 adenomas were correctly localized, whereas 18 (60%) of 30 hyperplastic glands were localized. The overall specificity of the study was 98% with one false-positive study. Gland weight and vascularity were statistically significant predictors of uptake of sestamibi. CONCLUSION: Double-phase Tc-99m sestamibi imaging is a promising technique for localization of parathyroid adenomas in high-risk surgical patients. Localization of multiple hyperplastic glands remains a challenge.

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