what is a goiter?
Goiter. Goiter is an enlargement of the thyroid gland. The resulting bulge on the neck may become extremely large, but most simple goiters are brought under control before this happens.Occasionally a simple goiter may cause some difficulty in breathing and swallowing.PubMed Health Glossary.oiter is an enlargement of the thyroid gland. The resulting bulge on the neck may become extremely large, but most simple goiters are brought under control before this happens. Occasionally a simple goiter may cause some difficulty in breathing and swallowing. PubMed Health Glossary.