Original: Classification They are classified in different ways: A "diffuse goiter" is a goiter that has spread through all of the thyroid (and can be a "simple goitre", or a "multinodular goitre").
Simplified: Classification They are classified in different ways: A "diffuse goitre" is a goitre that has spread through all of the thyroid (and can be a "simple goitre", or a "multinodular goitre").