Riedel's thyroiditis

Clinic

• It is a chronic form of thyroiditis.
• It is one manifestation of a systemic disease that can affect many organ systems called IgG4-related disease.
• It is often a multi-organ disease affecting pancreas, liver, kidney, salivary and orbital tissues and retroperitoneum.
• It is characterized by a replacement of the normal thyroid parenchyma by a dense fibrosis.
• MTB is suggested as a rare etiology.