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A member asked:
What can cause a substernal goiter?
A doctor has provided 1 answer
Not known: Decades ago iodine deficiency was a common cause. These days the cause of benign enlargement of the thyroid (goiter) is not known. A substernal goiter is an enlarged thyroid that extends from the neck into the chest. Anyone with an enlarged thyroid should have an ultrasound and most likely a needle biopsy of the gland.
Answered 6/14/2014
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