Hashimoto's thyroiditis – an independent risk factor for papillary carcinoma

The link between Hashimoto's thyroiditis and thyroid carcinoma has long been a topic of controversy. The aim of our study was to determine the prevalence of thyroid carcinoma and Hashimoto's thyroiditis coexistence in histopathologic material of thyroidectomized patients. In a retrospectiv...

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Published in:Brazilian journal of otorhinolaryngology Vol. 84; no. 6; pp. 729 - 735
Main Authors: Uhliarova, Barbora, Hajtman, Andrej
Format: Journal Article
Language:English
Published: Brazil Elsevier Editora Ltda 01-11-2018
Elsevier
Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial
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Summary:The link between Hashimoto's thyroiditis and thyroid carcinoma has long been a topic of controversy. The aim of our study was to determine the prevalence of thyroid carcinoma and Hashimoto's thyroiditis coexistence in histopathologic material of thyroidectomized patients. In a retrospective study, the clinicohistopathologic data of 2117 patients (1738 females/379 males), who underwent total or partial thyroidectomy for thyroid gland disorder at a single institution from the 1st of January 2005 to the 31st of December 2014 were analyzed. Thyroid carcinoma was detected in 318 cases (15%) and microcarcinoma (thyroid cancer ≤10mm in diameter) was found in permanent sections in 169 cases (8%). Hashimoto's thyroiditis was detected in 318 (15%) patients. Hashimoto's thyroiditis was significantly more often associated with thyroid carcinoma and microcarcinoma compare to benign condition (p=0.048, p=0.00014, respectively). Coexistence of Hashimoto's thyroiditis and thyroid carcinoma/thyroid microcarcinoma did not affect tumor size (p=0.251, p=0.098, respectively), or tumor multifocality (p=0.831, p=0.957, respectively). Bilateral thyroid microcarcinoma was significantly more often detected when Hashimoto's thyroiditis was also diagnosed (p=0.041), but presence of Hashimoto's thyroiditis did not affect bilateral occurrence of thyroid carcinoma (p=0.731). Hashimoto's thyroiditis is associated with significantly increased risk of developing thyroid carcinoma, especially thyroid microcarcinoma. A relação entre a tireoidite de Hashimoto e o carcinoma de tireoide tem sido um tema de controvérsia por um longo tempo. Determinar a prevalência da coexistência de carcinoma de tireoide e tireoidite de Hashimoto no exame histopatológico de amostras de pacientes tireoidectomizados. Em um estudo retrospectivo, foram analisados os dados clinico-histopatológicos de 2.117 pacientes (1.738 mulheres/379 homens), submetidos à tireoidectomia total ou parcial por distúrbio da glândula tireoide em uma única instituição, de 1° de janeiro de 2005 a 31 de dezembro de 2014. O carcinoma de tireoide foi detectado em 318 casos (15%) e o microcarcinoma (câncer de tireoide ≤ 10mm de diâmetro) foi encontrado em secções permanentes em 169 casos (8%). A tireoidite de Hashimoto foi detectada em 318 (15%) pacientes e foi associada ao carcinoma da tireoide e ao microcarcinoma com maior frequência em comparação com condições benignas (p = 0,048, p = 0,00014, respectivamente). A coexistência de tireoidite de Hashimoto e carcinoma/microcarcinoma não influenciou o tamanho do tumor (p = 0,251, p = 0,098, respectivamente) ou a multifocalidade tumoral (p = 0,831, p = 0,957, respectivamente). O microcarcinoma de tireoide bilateral foi detectado com maior frequência quando a tireoidite de Hashimoto também foi diagnosticada (p = 0,041), mas a presença de tireoidite não influenciou na ocorrência bilateral de carcinoma (p = 0,731). A tireoidite de Hashimoto está associada a um aumento significativo do risco do desenvolvimento de carcinoma de tireoide, especialmente microcarcinoma da tireoide.
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ISSN:1808-8694
1808-8686
1808-8686
DOI:10.1016/j.bjorl.2017.08.012