Diffuse thyroiditis involves inflammation of the thyroid gland, causing its enlargement and potentially affecting thyroid function. According to the provided reference, diffuse thyroid disease, which includes thyroiditis, refers to thyroid conditions characterized by gland enlargement that can impact how the thyroid works. Thyroiditis is thus a type of diffuse thyroid disease.
In essence, diffuse thyroiditis means the inflammation isn't localized to one spot in the thyroid, but rather affects the entire gland. This inflammation can lead to either an overactive thyroid (hyperthyroidism) or an underactive thyroid (hypothyroidism), depending on the specific type of thyroiditis and its stage.
