4884 Images   :   Last WebSite Update: Thursday, August 28, 2014
Follow us:     
 
advertisement


Riedel Thyroiditis

slide 17 of 19


Comments:
Riedel thyroiditis is a form of chronic thyroiditis in which thyroid parenchyma is replaced by dense fibrous tissue. It is related to a group of idiopathic systemic disorders known as inflammatory fibrosclerosis and is associated with an increased number of IgG4-positive plasma cells. Riedel thyroiditis has also been referred to by other names such as Riedel struma, fibrous thyroiditis, and invasive thyroiditis. Dense fibrosis may engulf vital structures in the neck such as trachea causing severe dyspnea. Clinically, it may mimic carcinoma. This low-power image shows hyalinized fibrous tissue with inflammatory cells completely replacing the affected part of the thyroid gland.

slide 17 of 19