Thyroid nodules are very common. Many are detected incidentally during an unrelated imaging procedure while others are discovered by a clinician’s physical exam.
- A thyroid cyst is simply a thyroid nodule filled with fluid – it is almost always benign and can fluctuate in size.
- A goiter is an enlarged thyroid that protrudes from the neck. It can be caused by a diet deficient in iodine, but in the United States it’s most often caused by a defect that causes hormones to fluctuate.
- A Substernal Goiter is when your thyroid grows very large and extends below your breastbone where it can compress your windpipe in a non-easily accessible location.