Thyroid is the largest endocrine gland in the body, located below the soft bone at the front of the neck. It produces thyroid hormones using iodine, which play a crucial role in regulating the body's metabolism. Dysregulation of thyroid hormone levels can lead to functional diseases such as hyperthyroidism and hypothyroidism. In recent years, there has been an increase in thyroid nodules, many of which are diagnosed as thyroid cancer. Hyundae Hospital's Thyroid Clinic, we offer comprehensive care for thyroid disorders related to hyperthyroidism, hypothyroidism, thyroiditis, and the rapidly increasing incidence of thyroid nodules, particularly thyroid cancer. We provide ultrasound-guided biopsies and surgical treatments for these conditions, ensuring accurate diagnosis and effective management.