Thyroid Scanning with 131Cs

Abstract

Scanning of the thyroid gland after the administration of radioactive caesium (¹³¹Cs) was performed in 45 patients; in 38 of these it had been shown that a thyroid nodule failed to accumulate sodium per-technetate (^99mTc) or sodum iodide (¹³¹I). ¹³¹Cs was concentrated in the nodule to a greater degree than in the paranodular thyroid tissue in seven patients, in five of whom thyroid carcinoma was subsequently identified. In five patients ¹³¹Cs accumulated in both the nodule and paranodular tissue, while in the other 26 no ¹³¹Cs uptake occurred in the nodule. In only one of the latter group was the thyroid lesion malignant. Caesium scanning seems to offer a useful supplementary procedure in the investigation of thyroid nodules.

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