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Objectives:   The objectives of this study were to explore the clinical heterogeneity of differentiated thyroid cancer (DTC) between prepubertal children and adolescents and guide clinical treatment.   Methods:   A retrospective study included patients with DTC aged ≤19 years in Beijing Children’s Hospital from June 2014 to June 2019. All patients were enrolled and divided into 2 subgroups based on the threshold age of 10 years, namely the childhood group (CG) (≤10 years old); and the adolescent group (AG) (between 10 and 19 years old). The χ 2  test and Fisher’s exact test were used to estimate the effect of risk factors in the 2 age groups. Multivariate binary logistic regression models were conducted to assess the recurrent risk factors.   Results:   Seventy cases of DTC were included with an average age of 9.94 ± 2.88 years, including 35 in CG and 35 in AG. The most common clinical manifestation was a painless mass in the neck, accounting for 77.1% (54/70) of patients. Compared with the AG, the CG was more likely to have lymph node metastasis ( p  = 0.022) and distant metastasis ( p  = 0.041). The CG was more likely to have extrathyroidal extension ( p  = 0.012) and had a significantly higher recurrence rate than the AG ( p  = 0.040). Age was an independent variable predictive of recurrence ( p  = 0.0347).   Conclusion:   Regional invasiveness, cervical lymph node metastasis, and distant metastasis of DTC were more likely to occur in children ≤10 years old. Meanwhile, children ≤10 years old with DTC were more likely to have recurrence than adolescent’s postsurgical treatment. Thus, children younger than 10 years of age with DTC should be treated more aggressively.

european thyroid journal

Clinical Heterogeneity of Differentiated Thyroid Cancer between Children Less than 10 Years of Age and Those Older than 10 Years: A Retrospective Study of 70 Cases