- Thyroid
- Clinicopathological Characteristics and Recurrence-Free Survival of Rare Variants of Papillary Thyroid Carcinomas in Korea: A Retrospective Study
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Mijin Kim, Sun Wook Cho, Young Joo Park, Hwa Young Ahn, Hee Sung Kim, Yong Joon Suh, Dughyun Choi, Bu Kyung Kim, Go Eun Yang, Il-Seok Park, Ka Hee Yi, Chan Kwon Jung, Bo Hyun Kim
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Endocrinol Metab. 2021;36(3):619-627. Published online June 10, 2021
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DOI: https://doi.org/10.3803/EnM.2021.974
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 Abstract
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- Background
We aimed to evaluate the clinicopathological features and biological behaviors of Korean thyroid cancer patients with rare variants of papillary thyroid carcinoma (PTC) to address the ambiguity regarding the prognostic consequences of these variants.
Methods
We retrospectively reviewed the medical records of 5,496 patients who underwent thyroid surgery for PTC, between January and December 2012, in nine tertiary hospitals. Rare PTC variants included tall cell (TCV), columnar cell (CCV), diffuse sclerosing (DSV), cribriform-morular (CMV), solid (SV), hobnail, and Warthin-like variants. Recurrence-free survival (RFS) was defined as the time from the date of thyroidectomy until recurrence.
Results
Rare variants accounted for 1.1% (n=63) of the PTC patients; with 0.9% TCV, 0.02% CCV, 0.1% DSV, 0.1% CMV, and 0.1% SV. The mean age of patients and primary tumor size were 42.1±13.1 years and 1.3±0.9 cm, respectively. Extrathyroidal extension and cervical lymph node metastasis were observed in 38 (60.3%) and 37 (58.7%) patients, respectively. Ultrasonographic findings revealed typical malignant features in most cases. During a median follow-up of 7 years, 6.3% of patients experienced a locoregional recurrence. The 5-year RFS rates were 71.4% in patients with DSV or SV, 95.9% for TCV, or CCV, and 100% for other variants. DSV emerged an independent risk factor associated with shorter RFS.
Conclusion
In this multicenter Korean cohort, rare variants accounted for 1.1% of all PTC cases, with TCV being the most frequent subtype. DSV emerged as a significant prognostic factor for RFS.
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Citations
Citations to this article as recorded by  - Serum thyroglobulin testing after thyroid lobectomy in patients with 1–4 cm papillary thyroid carcinoma
Ahreum Jang, Meihua Jin, Chae A Kim, Min Ji Jeon, Yu-Mi Lee, Tae-Yon Sung, Tae Yong Kim, Won Bae Kim, Young Kee Shong, Won Gu Kim
Endocrine.2023; 81(2): 290. CrossRef - Do Histologically Aggressive Subtypes of Papillary Thyroid
Microcarcinoma have Worse Clinical Outcome than Non-Aggressive Papillary Thyroid
Microcarcinoma Subtypes? A Multicenter Cohort Study
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Hormone and Metabolic Research.2023; 55(05): 323. CrossRef - The Warthin-like variant of papillary thyroid carcinomas: a clinicopathologic analysis report of two cases
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Frontiers in Medicine.2022;[Epub] CrossRef
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