There are several different types of thyroid nodules, including the following: Colloid Nodules — One or more overgrowths of normal thyroid tissue, colloid nodules are benign (non-cancerous). Although they may grow large, they do not spread beyond the thyroid gland. Thyroid Cysts — Another type of growth, thyroid cysts are filled with fluid or are partly solid and partly filled with fluid. Inflammatory Nodules — Developing as a result of chronic (long-term) inflammation (swelling) of the thyroid gland, inflammatory nodules may or may not cause pain. Multinodular Goiter — An enlarged thyroid (goiter) can sometimes be made up of many nodules (which are usually benign). Hyperfunctioning Thyroid Nodules — As these nodules can produce their own supply of thyroid hormones in addition to the normal levels produced by the thyroid, they may lead to the development of hyperthyroidism. Hyperthyroidism can have serious effects on the metabolism and heart and cause such problems as hypertension (high blood pressure), sudden cardiac arrest, abnormal heart rhythm (arrhythmia), osteoporosis and other health concerns. Thyroid Cancer — These thyroid nodules are the least common and make up less than 5 percent of thyroid nodules. While cancer of the thyroid occurs more often in people who have sustained radiation to the head, neck or chest, it may also occur in those without any known risk factors. The four main types of thyroid cancer are: - Follicular thyroid cancer - Papillary thyroid cancer - Anaplastic thyroid cancer - Medullary thyroid cancer Fortunately, most cases of thyroid cancer can be cured with appropriate treatment. If you or someone you love is experiencing symptoms of a thyroid disorder, come to Arkansas Diabetes and Endocrinology Center for a professional evaluation today. It is our mission to provide the highest quality care for every patient, and by doing so, improve their overall quality of life. Call us today to speak with one of our medical professionals, or schedule one online. We look forward to serving you!