If you've ever noticed a lump at the base of your neck, it could be a sign of goiter, an abnormal enlargement of the thyroid ...

A = original plain film of the neck, before thyroidectomy ... showing a clear airway after surgical removal of the intratracheal goiter. After recovery from the respiratory infection, subtotal ...

"A century ago, much of northern America was known as the goiter belt," said The Economist. A lack of natural iodine in the soil and water, and an iodine-poor diet, led to the "characteristic neck ...