CHORUS

Collaborative Hypertext of Radiology

Nervous system

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ectopic thyroid

• usually connects to normal thyroid

• sites:
  • lingual thyroid
  • thyroglossal duct remnant
  • anterior mediastinum ("retrosternal thyroid")
  • btw trachea and esophagus
  • struma ovarii (teratoma variant)

• use pertechnetate first (rather than I-131) because of lower dose

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