The thyroid gland is in the neck. It is part of the endocrine system and produces a substance (thyroid hormone) that helps regulate metabolism. Thyroid nodules are glandular masses of this tissue. Lumps may be caused by infection, cysts, benign tumors. or malignant tumors of the thyroid gland Most lumps are small tumors or fluid-filled cysts. because some thyroid lumps are cancerous Every piece should be inspected.
