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The presence of a carcinoma in a multinodular goitre of an euthyroid patient cannot be ruled out by means of radioactive iodine and technetium scanning. Gallium‐67 (Ga‐67) citrate, a radiopharmaceutical with high tumour affinity, has been given intravenously to 13 patients. Five patients showed a positive gallium scan of the thyroid gland, 3 of them had a thyroid carcinoma, 1 a leiomyosarcoma and 1 thyroiditis. Two other patients showed uptake of radioactive gallium in a metastasis of thyroid carcinoma in the skull. The remaining 6 patients showed a negative gallium scan of the thyroid gland, 2 of them had a small thyroid carcinoma. Scanning with Ga‐67 seems to be useful in the preoperative diagnosis of thyroid carcinoma.
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Roos et al. (1973) studied this question.
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