Definition: Riedel thyroiditis (RT) is an uncommon form of chronic thyroiditis in which the thyroid gland is replaced by fibrous tissue. The etiologic mechanisms underlying RT are unclear.
Associations
multisegmental spinal leptomeningeal fibrosis (12691392)
See also
idiopathic fibrosclerotic disorders
inflammatory pseudotumors
References
Papi G, Corrado S, LiVolsi VA. Primary spindle cell lesions of the thyroid gland; an overview. Am J Clin Pathol. 2006 Jun;125 Suppl:S95-123. PMID: 16830961
Papi G, LiVolsi VA. Current concepts on Riedel thyroiditis. Am J Clin Pathol. 2004 Jun;121 Suppl:S50-63. Review. PMID: 15298150
Dehner LP, Coffin CM. Idiopathic fibrosclerotic disorders and other inflammatory pseudotumors. Semin Diagn Pathol. 1998 May;15(2):161-73. PMID: 9606807
Zimmermann-Belsing T, Feldt-Rasmussen U. Riedel’s thyroiditis: an autoimmune or primary fibrotic disease? J Intern Med. 1994 Mar;235(3):271-4. PMID: 8120524
Schwaegerle SM, Bauer TW, Esselstyn CB Jr. Riedel’s thyroiditis. Am J Clin Pathol. 1988 Dec;90(6):715-22. PMID: 3057862