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Ectopic thyroids have lower computed tomography attenuation values than orthotopic thyroids.

Ting Gu1, Ying-Li Lu1, Bing Han1

  • 1Division of Endocrinology and Metabolism, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.

Endocrine
|September 12, 2018
PubMed
Summary
This summary is machine-generated.

Ectopic thyroid tissue shows lower computed tomography (CT) values than normal thyroid tissue. This difference in CT attenuation may indicate structural or functional abnormalities in ectopic thyroid glands.

Keywords:
AttenuationComputed tomographyEctopic thyroidOrthotopic thyroid

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Area of Science:

  • Radiology
  • Endocrinology
  • Medical Imaging

Background:

  • Ectopic thyroid tissue can occur in various locations, potentially leading to diagnostic challenges.
  • Understanding the imaging characteristics of ectopic thyroid is crucial for accurate diagnosis and management.

Purpose of the Study:

  • To compare the computed tomography (CT) attenuation values of ectopic thyroid tissue with those of orthotopic (normal) thyroid tissue.
  • To investigate potential differences in CT characteristics that could aid in identifying ectopic thyroid.

Main Methods:

  • A retrospective study included 21 patients with 23 ectopic thyroids and 23 controls with orthotopic thyroids.
  • CT scans were analyzed by two blinded radiologists to assess non-enhanced and contrast-enhanced attenuation values.
  • Independent-Samples T-test was used for statistical comparison between the two groups.

Main Results:

  • Ectopic thyroids exhibited significantly lower non-enhanced CT attenuation (91.04 HU) compared to orthotopic thyroids (106.56 HU).
  • Contrast-enhanced CT attenuation was also significantly lower in ectopic thyroids (141.32 HU) versus orthotopic thyroids (169.82 HU).
  • Statistical analysis confirmed significant differences in CT attenuation values (P < 0.05).

Conclusions:

  • Ectopic thyroid tissue demonstrates lower CT attenuation values than orthotopic thyroid tissue.
  • These findings suggest that structural or functional abnormalities, including dysgenesis and pathological changes, may underlie the decreased CT attenuation in ectopic thyroids.
  • Reduced CT attenuation may serve as an imaging biomarker for functional deficiency in ectopic thyroid glands.