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Author Spotlight: Integrating Ultrasound Imaging with Biochemical Markers for Thyroid Disease Diagnosis
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Accessory Thyroid Tissue Detected Using 131 I SPECT/CT Imaging.

Wilson Chun Tao1, Owen Kang2, Robert Russo

  • 1From the Faculty of Medicine and Health, University of Sydney.

Clinical Nuclear Medicine
|April 29, 2022
PubMed
Summary

Accessory thyroid tissue, a rare congenital anomaly, was found in 21.1% of patients undergoing radioiodine therapy. The most common location for this ectopic thyroid tissue was the lingual region.

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Area of Science:

  • Endocrinology
  • Nuclear Medicine
  • Congenital Anomalies

Background:

  • Thyroid ectopia is a rare congenital anomaly where thyroid tissue is found outside its normal pretracheal position.
  • Accessory thyroid tissue can occur in various locations, posing diagnostic and therapeutic challenges.

Purpose of the Study:

  • To assess the prevalence and location of accessory thyroid tissue in patients undergoing postablative radioiodine therapy.
  • To determine the frequency of thyroid ectopia in a specific patient cohort within a nuclear medicine department.

Main Methods:

  • Retrospective analysis of 57 patients treated between September 2020 and September 2021.
  • Identification and documentation of all accessory thyroid tissue separate from the orthotopic thyroid gland.
  • Evaluation of tissue location in patients receiving postablative radioiodine therapy.

Main Results:

  • Accessory thyroid tissue was identified in 21.1% (12/57) of the evaluated patients.
  • The lingual region was the most frequent site for accessory thyroid tissue.
  • This finding highlights a significant prevalence of ectopic thyroid tissue in this patient group.

Conclusions:

  • Accessory thyroid tissue is more common than previously thought in patients undergoing radioiodine therapy.
  • The lingual location is a primary site for ectopic thyroid tissue, requiring consideration in nuclear medicine imaging and treatment.
  • Further research may elucidate the clinical significance and management implications of accessory thyroid tissue.