(riedel thyroiditis) Thyroiditis of unknown etiology, characterized by extensive fibrosis of the thyroid parenchyma. The fibrosis extends beyond the thyroid gland capsule to the adjacent structures.

(igg4-related thyroid disease) A fibroinflammatory disorder of the thyroid gland, occuring more frequently in females, characterized a large, hard thyroid mass, and presenting with pressure symptoms (breathing difficul�ties and dysphagia) or voice hoarseness and aphonia (impingement of recurrent laryngeal nerve). It can often be associated with extracervical fibroinflammatory disorders such as retroperitoneal fibrosis, primary scleroisng cholangitis and autoimmune diseases such as Hashimoto struma, Addison disease, and Biermer disease.

(riedel fibrosing thyroiditis) An inflammatory disorder of unknown etiology that affects the thyroid gland. It is characterized by extensive fibrosis of the thyroid parenchyma. The fibrosis extends beyond the thyroid gland capsule to the adjacent structures.

Riedel thyroiditis, or Riedel's thyroiditis (RT), is a rare, chronic inflammatory disease of the thyroid gland characterized by a dense fibrosis that replaces normal thyroid parenchyma. The fibrotic process invades adjacent structures of the neck and extends beyond the thyroid capsule.

Riedel thyroiditis, extremely rare form of chronic inflammation of the thyroid gland, in which the glandular tissues assume a densely fibrous structure, interfering with production of thyroid hormone and compressing the adjacent trachea and esophagus. The thyroid becomes enlarged, often...