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131I abnormal uptake by the thyroid bed from Zuckerkandl tubercle diagnosis by 131I SPECT/CT
Joji Kawabe1, Shigeaki Higashiyama, Kohei Kotani
1From the Departments of *Nuclear Medicine and †Surgical Oncology, Graduate School of Medicine, Osaka City University, Osaka, Japan.
Abstract:
After thyroid remnant ablation following total thyroidectomy for thyroid cancer, 131I SPECT/CT revealed 131I uptake, regarded as thyroid bed uptake on planar images, in the anterior cervical region. On SPECT/CT, the 131I uptake focus appeared at the esophagus, suggesting esophageal invasion. No esophageal invasion had been recognized intraoperatively, and no residual uptake was detected by 131I scintigraphy evaluating therapeutic effects 3 months after ablation. Preoperative CT revealed a retrotracheal space portion extending from the normal thyroid with the same density, suggesting Zuckerkandl tubercle. Abnormal uptake on SPECT/CT was deemed Zuckerkandl tubercle-derived thyroid bed uptake.
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