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Abstract
Warthin-like subtype of papillary thyroid carcinoma (WLPTC) is a rare subtype of papillary thyroid carcinoma. This PTC subtype shows some pattern resemblance to Warthin tumors of the salivary gland, which confers its name but is a not genetically similar to salivary Warthin tumor, with the most frequent genetic change in WLPTC being BRAF p.V600E, the most frequent genetic driver of PTC. Warthin-like subtype of papillary thyroid carcinoma is found to have a favorable prognosis. We report a 44-year-old woman who presented with anterior neck swelling and elevated levels of antithyroid peroxidase antibodies. Fine-needle aspiration cytology showed features of papillary thyroid carcinoma and lymphocytic thyroiditis. On histopathological examination, thyroid follicular cells have oncocytic cytoplasm with infiltration of the tumor and fibrovascular cores by a dense lymphoplasmacytic infiltrate. Numerous multinucleated giant cells in the tumor are a notable feature. The final diagnosis is Warthin-like papillary thyroid carcinoma arising in association with chronic lymphocytic (Hashimoto) thyroiditis. Along with this case report, we perform a literature review of WLPTC between 2010 and 2024.
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