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. 1985 Apr;10(4):235-9.
doi: 10.1097/00003072-198504000-00001.

Localization of enlarged parathyroid glands by thallium-201 and technetium-99m subtraction imaging. Gland mass and parathormone levels in primary hyperparathyroidism

Localization of enlarged parathyroid glands by thallium-201 and technetium-99m subtraction imaging. Gland mass and parathormone levels in primary hyperparathyroidism

T M Gimlette et al. Clin Nucl Med. 1985 Apr.

Abstract

Twenty-two patients, all with surgically proven primary hyperparathyroidism, were studied by TI-201 thallous chloride and Tc-99m pertechnetate subtraction imaging. Fifteen parathyroid adenomata and one hyperplastic gland between 0.33 and 14.8 g were correctly localized in 16 patients. Two adenomata and seven hyperplastic or histologically normal parathyroids between 0.1 g and 1.4 g in seven patients were not localized. One patient had a correctly localized 13.0-g adenoma with a nonlocalized 0.3 g hyperplastic parathyroid gland and there were two false positive localizations. Sensitivity was 64% (glands), and 73% (patients). There was only fair correlation with parathormone (PTH) levels, but these were elevated in all but four of the patients with correctly localized parathyroids. The authors conclude that the imaging procedure is useful but its sensitivity is limited by difficulty in localizing correctly small glands, particularly those of less than 0.5 g, which comprised 29% of those excised.

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