When a tumor has attained this size, pressure-symptoms are often relieved by the weight of the tumor making traction away from the trachea.

Goiter is endemic in some countries, particularly in Switzerland and Austria, and appears particularly at the age of childhood or of puberty.

Some communities in this country using water containing an excess of calcium salt show distinct evidences of endemic goiter.

Extirpation of the thyroid gland has in recent years been successfully practiced.

Warren has extirpated one lobe of the thyroid after preliminary ligation of the common carotid on the same side.