Saleha Babli1,2, Richard J Payne3, Elliot Mitmaker4, Juan Rivera1. 1. Division of Endocrinology and Metabolism, Department of Medicine, Montreal General Hospital, McGill University, Montreal, Québec, Canada. 2. Department of Endocrinology and Diabetes, Prince Sultan Military Medical City, Riyadh, Saudi Arabia. 3. Department of Otolaryngology, Royal Victoria Hospital, McGill University, Montreal, Québec, Canada. 4. Department of Surgery, Montreal General Hospital, McGill University, Montreal, Québec, Canada.
Abstract
BACKGROUND: The effects of chronic lymphocytic thyroiditis (CLT) on the presentation and outcome of papillary thyroid carcinoma (PTC) have long been a topic of controversy. OBJECTIVE: To evaluate the effect of coexistent CLT on the clinicopathological features of PTC. DESIGN: Retrospective study. PATIENTS: All patients with PTC who had been followed by the 2 co-investigators (Juan Rivera and Richard J. Payne) between 2006 and 2011 were included. RESULTS: CLT was present in 35% (166) of the included patients and was associated with a higher proportion of patients with TNM stage I (p = 0.027) and fewer patients with persistent disease (p = 0.014) in comparison with the PTC-only group. Analysis of the data based on age (<45 or >45 years) revealed that in the older group, the presence of CLT was associated with fewer patients with persistent disease (p = 0.03) and capsular invasion (p = 0.05). However, in patients <45 years of age, the presence of CLT was associated with more capsular invasion (p = 0.003) and extrathyroidal extension (p = 0.004) compared with the PTC-only group. CONCLUSIONS: CLT in patients with PTC was associated with lower-stage disease and less disease persistence in patients >45 years of age. In patients <45 years, the presence of CLT appeared to be associated with unfavorable pathological features.
BACKGROUND: The effects of chronic lymphocytic thyroiditis (CLT) on the presentation and outcome of papillary thyroid carcinoma (PTC) have long been a topic of controversy. OBJECTIVE: To evaluate the effect of coexistent CLT on the clinicopathological features of PTC. DESIGN: Retrospective study. PATIENTS: All patients with PTC who had been followed by the 2 co-investigators (Juan Rivera and Richard J. Payne) between 2006 and 2011 were included. RESULTS: CLT was present in 35% (166) of the included patients and was associated with a higher proportion of patients with TNM stage I (p = 0.027) and fewer patients with persistent disease (p = 0.014) in comparison with the PTC-only group. Analysis of the data based on age (<45 or >45 years) revealed that in the older group, the presence of CLT was associated with fewer patients with persistent disease (p = 0.03) and capsular invasion (p = 0.05). However, in patients <45 years of age, the presence of CLT was associated with more capsular invasion (p = 0.003) and extrathyroidal extension (p = 0.004) compared with the PTC-only group. CONCLUSIONS: CLT in patients with PTC was associated with lower-stage disease and less disease persistence in patients >45 years of age. In patients <45 years, the presence of CLT appeared to be associated with unfavorable pathological features.
Entities:
Keywords:
Chronic lymphocytic thyroiditis; Disease persistence; Papillary thyroid cancer
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