the.com/goiter

An enlarged thyroid gland, often caused by iodine deficiency, that swells visibly in the neck.

means A visible swelling in the neck caused by an enlarged thyroid gland, often from iodine deficiency or other thyroid disorders.

from Goiter traces back through French 'goitre' to the Latin 'guttur,' meaning throat — the same root that gives us 'gutter' and 'gutteral.' Folk tradition in Alpine regions linked the condition to mountain water and poor diet long before anyone understood iodine's role, so the word has been pointing at the throat for centuries, even as the science behind the swelling kept changing.

visible sign
neck swells into a lump or collar
historic cause
iodine-poor diets, especially inland regions
fix
iodized salt basically erased it in most countries
not always low
can also signal an overactive thyroid
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