PMC9355607_01
Thyroid ultrasound imaging. Marked hypoechoic lesion on admission (A). Decreased hypoechoic lesion by half when the first follow-up on April 9 (B). Further decreased hypoechoic lesion when the second follow-up on May 21 (C). Disappeared hypoechoic lesion when the third follow-up on September 10 (D).
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F1
Further ultrasound defined the characteristics of the nodules as hypoechoic areas with blurred margins, irregular shapes, and decreased vascularity, in line with the clinical location on physical examination (Figure 1A). During the follow-up, neck pain was relieved 20 days later; hypoechoic areas were decreased gradually and disappeared 6 months later (Figures 1B-D).
Thyroid radioactive iodine uptake.
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F2
In order to differentiate the etiology of thyrotoxicosis, a radioactive iodine uptake (RAIU) was performed and found to be significantly low (Figure 2).
The whole timeline of clinical progression.
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F3
The whole timeline of clinical progression is shown in Figure 3.