Fibrous variant of Hashimoto’s Thyroiditis - 7 Quick Facts

 Dr Sampurna Roy MD                                                           

1) The fibrous variant of Hashimoto’s thyroiditis is probably a genuine variant rather than just a late stage of Hashimoto's thyroiditis since these patients appear to have pronounced fibrosis from an early stage.

2) The fibrosis is in broad hyaline bands and does not extend into other tissues.

3) Hurthle cells may be present.

4) Obliterative vascular changes are not seen.

5) The plasma cells present express IgG.

6) Lymphoid aggregates may be present.

7) The patients may have other organ-specific autoimmune diseases as with regular Hashimoto's thyroiditis, and the condition is not associated with fibromatoses.

Riedel's thyroiditis and fibrous variant of Hashimoto's thyroiditis: a clinicopathological and immunohistochemical study.

A thyroid biopsy with histologic features of both Riedel's thyroiditis and the fibrosing variant of Hashimoto's thyroiditis.

Fibrous thyroiditis--an immunopathological study.

Simultaneous involvement of thyroid by Riedel's [correction of Reidel's] disease and fibrosing Hashimoto's thyroiditis: a case report.