- Goiter - Describes the background, pathophysiology, frequency, and clinical features of thyroid enlargement. By eMedicine.
- Pendred Syndrome - A genetic condition associated with deafness and goiter.
- Pendred Syndrome - An inherited autosomal recessive condition which consists of deafness from the time of birth and enlargement of the thyroid gland. From MedicineNet.
- Thyroid Goiter - Describes the causes of thyroid enlargement. Contains photos and illustrations. By EndocrineWeb.
- Toxic Nodular Goiter - Contains an overview, causes, risk factors, signs and symptoms, prevention, and treatment.