What Makes Riedel's Thyroiditis Unique Histologically?
Riedel's Thyroiditis is characterized by dense fibrosis that can replace normal thyroid tissue. The fibrotic process can extend beyond the thyroid gland into adjacent structures, such as the surrounding muscles and trachea. Inflammatory cells, including lymphocytes and plasma cells, are often present, but the degree of fibrosis is the most striking feature.
