thyroid nodules are solid or fluid-filled lumps on the surface of the thyroid gland

thyroid health medical anatomy illustration disorder body hyperthyroidism medicine science hypothyroidism internal disease hashimoto human 3d goiter illness hormone endocrine autoimmune gland thyroiditis hashimotos nodules hand inflammation rendering symptom cold patient hormones treatment anatomical biology iodine system pain diagnosis woman dysfunction sick graphic immune ill fatigue male man weight transparent