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36 MBq of Tc-99m pertechnetate was administered intravenously and planar images in anterior, left anterior oblique, and right anterior oblique projections were acquired 20 minutes post injection.
Well-circumscribed area of radiotracer concentration in the posterior floor of the mouth representing lingual thyroid. No radiotracer uptake is seen in the anatomical region of the thyroid gland. Thyroid uptake function=1% (normal: 0.4‒4%).