Prevalence and Clinicopathologic Association of Hashimoto’s Thyroiditis in Papillary Thyroid Cancer after Radioiodine (I-131) Treatment

Main Article Content

Korrakode Sirakriengkrai

Abstract

Background: Some of the patients with papillary thyroid cancer (PTC) have coexistence of Hashimoto’s thyroiditis or chronic lymphocytic thyroiditis (CLT). Association between CLT, clinicopathologic factors and
response to radioiodine (I-131) treatment remain unclear.


Objective: To determine the prevalence of CLT in PTC and the association of coexistent CLT and the clinicopathological features of PTC.


Materials and methods: A cross-sectional analytical study was conducted among 277 patients who underwent thyroidectomy and I-131 treatment in Surat Thani Hospital between January 2009 and May 2016.
Clinical data, pathological characteristics and response to I-131 treatment were compared between the two groups according to the presence or absence of CLT. The association between CLT and clinicopathologic
factors were analyzed by logistic regression analysis.


Results: The mean age of patients was 42.9±13.0 years (range 19-84). Most of them were female (n=250, 90.2%).CLT was present in 65 cases (23.5%). Excellent response to I-131 in the CLT group was higher than the non-CLT group (80.0% vs 66.5%, p=0.038) and associated with the presence of CLT by univariate logistic regression (OR 2.01, 95%CI 1.03-3.94, p=0.041). Using multivariate logistic regression, factors associated with the presence of CLT were female (adjusted OR 10.59, 95%CI 1.31-85.65, p=0.027); tumor size ≤ 1 cm (adjusted OR 1.86, 95%CI 1.06-1.93, p=0.041); extrathyroidal extension (adjusted OR 0.25, 95%CI 0.08-0.77, p=0.016); and capsular invasion (adjusted OR 0.29, 95%CI 0.09-0.96, p=0.042).


Conclusion: The prevalence of CLT in PTC was 23.5%. CLT was associated with females and tumor sizes ≤ 1 cm. There was a tendency for excellent responses to radioiodine treatment in the patients with PTC and

Article Details

How to Cite
Sirakriengkrai, K. (2020). Prevalence and Clinicopathologic Association of Hashimoto’s Thyroiditis in Papillary Thyroid Cancer after Radioiodine (I-131) Treatment. Lampang Medical Journal, 41(1), 1–8. Retrieved from https://he01.tci-thaijo.org/index.php/LMJ/article/view/241311
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Original Article

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