Increased Incidence of Well-Differentiated Thyroid Cancer Associated with Hashimoto Thyroiditis and the Role of the PI3k/Akt Pathway

Shawn D. Larson, Lindsey N. Jackson, Taylor S. Riall, Tatsuo Uchida, Robert P. Thomas, Suimin Qiu, B. Mark Evers

Research output: Contribution to journalArticle

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Abstract

Background: The link between inflammation and cancer is well-established, but the link between Hashimoto thyroiditis (HT) and thyroid cancer remains controversial. The purpose of our study was to determine the incidence of patients with thyroid cancer and associated HT at our institution, to correlate our patient population demographics with the Surveillance, Epidemiology and End Results (SEER) database, and to assess the expression of the phosphatidylinositol 3-kinase (PI3K)/Akt pathway in patients with HT. Study Design: Demographic and histologic data were collected from patients undergoing thyroid resection at the University of Texas Medical Branch from 1987 to 2002 and compared with the SEER database. Immunohistochemistry for phosphorylated Akt (a marker of PI3K activity), Akt isoforms and PTEN (an inhibitor of PI3K) was performed on paraffin-embedded blocks of resected thyroid tissue. Results: Our patient population demographics and thyroid cancer incidence by histologic type were similar to patients in the SEER database. Ninety-eight (37.7%) resected specimens had pathologic changes consistent with HT; 43 (43.8%) had an associated well-differentiated thyroid cancer. Increased phosphorylated Akt, Akt1, and Akt2 expression was noted in regions of HT and thyroid cancer compared with regions of normal surrounding thyroid tissue. Conclusions: Patients with HT were three times more likely to have thyroid cancer, suggesting a strong link between chronic inflammation and cancer development. PI3K/Akt expression was increased in both HT and well-differentiated thyroid cancer, suggesting a possible molecular mechanism for thyroid carcinogenesis.

Original languageEnglish (US)
Pages (from-to)764-773
Number of pages10
JournalJournal of the American College of Surgeons
Volume204
Issue number5
DOIs
StatePublished - May 2007

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Hashimoto Disease
Thyroid Neoplasms
Phosphatidylinositol 3-Kinase
Incidence
Thyroid Gland
Epidemiology
Demography
Databases
Inflammation
Paraffin
Population
Neoplasms
Protein Isoforms
Carcinogenesis
Immunohistochemistry

ASJC Scopus subject areas

  • Surgery

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Increased Incidence of Well-Differentiated Thyroid Cancer Associated with Hashimoto Thyroiditis and the Role of the PI3k/Akt Pathway. / Larson, Shawn D.; Jackson, Lindsey N.; Riall, Taylor S.; Uchida, Tatsuo; Thomas, Robert P.; Qiu, Suimin; Evers, B. Mark.

In: Journal of the American College of Surgeons, Vol. 204, No. 5, 05.2007, p. 764-773.

Research output: Contribution to journalArticle

Larson, Shawn D. ; Jackson, Lindsey N. ; Riall, Taylor S. ; Uchida, Tatsuo ; Thomas, Robert P. ; Qiu, Suimin ; Evers, B. Mark. / Increased Incidence of Well-Differentiated Thyroid Cancer Associated with Hashimoto Thyroiditis and the Role of the PI3k/Akt Pathway. In: Journal of the American College of Surgeons. 2007 ; Vol. 204, No. 5. pp. 764-773.
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