woman showing enlarget thyroid gland on her neck. endocrinology system , organ responsible for hormone production

hyperthyroidism thyroid gland enlarget neck enlarged hyperthyroid disease goiter health woman female medical adult human throat system anatomy patient hormone endocrine body medicine illness organ illustration anatomical endocrinology sickness nodule tumor healthy thyroidectomy cancer internal basedow big goitre hypothyroidism enlargement iodine graves thyrotoxicosis isolated benign healthcare lump