Hashimoto's thyroiditis in papillary thyroid carcinoma: a 22-year study

Area of Science:

• Endocrinology
• Oncology
• Pathology

Background:

• Hashimoto's thyroiditis (HT) is a common autoimmune thyroid disease.
• Papillary thyroid carcinoma (PTC) is the most prevalent type of thyroid cancer.

Purpose of the Study:

• To investigate the relationship between Hashimoto's thyroiditis and papillary thyroid carcinoma.
• To determine the impact of HT on prognostic factors in PTC patients.

Main Methods:

• Retrospective analysis of 1080 patients diagnosed with papillary thyroid carcinoma post-thyroidectomy.
• Histopathological evaluation of surgical specimens to confirm PTC and assess for HT in non-neoplastic thyroid tissue.

Main Results:

• Hashimoto's thyroiditis was identified in 36.1% of patients with papillary thyroid carcinoma.
• A significant positive correlation was found between the presence of HT and multifocal PTC (p < 0.05).
• No significant association was observed between HT and extrathyroidal tissue invasion (p > 0.05).

Conclusions:

• Patients with both HT and PTC have an increased likelihood of developing multifocal tumors.
• Surgical interventions for papillary thyroid carcinoma should consider the potential increased risk associated with Hashimoto's thyroiditis.