Abstract
BackgroundHurthle cell carcinoma makes up 3 to 5% of all thyroid cancers and is considered to be a true rarity. The aim of our study was to analyze clinical characteristics and survival rates of patients with Hurthle cell carcinoma.MethodsClinical data regarding basic demographic characteristics, tumor grade, type of surgical treatment and vital status were collected. Methods of descriptive statistics and Kaplan-Meier survival curves were used for statistical analysis. Cox proportional hazards regression was used to identify independent predictors.ResultsDuring the period from 1995 to 2014, 239 patients with Hurthle cell carcinoma were treated at our Institution. The average age of the patients was 54.3, with female to male ratio of 3.6:1 and average tumor size was 41.8 mm. The overall recurrence rate was 12.1%, with average time for relapse of 90.74 months and average time without any signs of the disease of 222.4 months. Overall 5-year, 10-year and 20-year survival rates were 89.4%, 77.2%, 61.9% respectively. The 5-year, 10-year and 20-year cancer specific survival rates were 94.6%, 92.5%, 87.4%, respectively. When disease free interval was observed, 5-year, 10-year and 20-year rates were 91.1%, 86.2%, 68.5%, respectively. The affection of both thyroid lobes and the need for reoperation due to local relapse were unfavorable independent prognostic factors, while total thyroidectomy as primary procedure was favorable predictive factor for cancer specific survival.ConclusionHurthle cell carcinoma is a rare tumor with an encouraging prognosis and after adequate surgical treatment recurrences are rare.
Highlights
Hurthle cell carcinoma makes up 3 to 5% of all thyroid cancers and is considered to be a true rarity
In order to be classified as a Hurthle cell carcinoma, a tumor should predominantly consist of the Hurthle cells, which originate from follicular epithelium of the thyroid gland
During 20-years period covered by the study, 13.385 patients were surgically treated due to thyroid gland diseases at our highly specialized center for endocrine surgery
Summary
Hurthle cell carcinoma makes up 3 to 5% of all thyroid cancers and is considered to be a true rarity. The aim of our study was to analyze clinical characteristics and survival rates of patients with Hurthle cell carcinoma. Hurthle cell carcinoma or oxyphilic carcinoma makes up 3 to 5% of all thyroid cancers and, is considered to be a true rarity [1, 2]. According to the current classification of the World Health Organization, Hurthle cell carcinoma represents a variant of follicular carcinoma of the thyroid gland. As for all other thyroid cancers, surgery represents primary and basic treatment method for Hurthle cell carcinoma, as well.
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