Highlights • Ectopic Thyroid Tissue in the mediastinum is very rare.• ETT can be associated with normal thyroid function and normal thyroid anatomical location.• ETT should be differentiated from substernal… Click to show full abstract
Highlights • Ectopic Thyroid Tissue in the mediastinum is very rare.• ETT can be associated with normal thyroid function and normal thyroid anatomical location.• ETT should be differentiated from substernal goiter.
               
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