Thyroiditis: Clinical aspects and diagnostic imaging

P. Vitti, T. Rago, G. Barbesino, L. Chiovato

Research output: Contribution to journalArticlepeer-review


Thyroiditis belongs to a heterogeneous group of inflammatory thyroid diseases. Hashimoto's thyroiditis, has an autoimmune pathogenesis: patients can be euthyroid or develop hypothyroidism, but may also experience transient thyrotoxicosis. Silent and postpartum thyroiditis also recognize an autoimmune origin; their clinical course being characterized by transient thyrotoxicosis occurring either sporadically or post-partum. Subacute thyroiditis is a painful, inflammatory disease of viral origin. Acute thyroiditis is a rare, serious, bacterial inflammatory disease. Riedel's thyroiditis is a rare chronic inflammatory disorder of unknown etiology, characterized by dense thyroid fibrosis. A diffuse thyroid hypoechogenicity is the hallmark of Hashimoto's thyroiditis, due to extensive lymphocytic infiltration of the gland. In postpartum and silent thyroiditis a diffuse or multifocal hypoechogenicity is found, while subacute thyroiditis is characterized by multiple ill-defined and migrating hypoechogenic areas. Both in acute and Riedel's thyroiditis there is marked hypoechogenicity.

Original languageEnglish
Pages (from-to)301-314
Number of pages14
JournalRays - International Journal of Radiological Sciences
Issue number2
Publication statusPublished - 1999


  • Hypoechogenicity
  • Hypothyroidism
  • Lymphocytic infiltration
  • Thyroid ultrasonography
  • Thyroiditis

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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