4.6 Article

Prepubertal Children with Papillary Thyroid Carcinoma Present with More Invasive Disease Than Adolescents and Young Adults

Journal

THYROID
Volume 33, Issue 2, Pages 214-222

Publisher

MARY ANN LIEBERT, INC
DOI: 10.1089/thy.2022.0098

Keywords

papillary thyroid cancer; pediatric thyroid cancer; puberty; pediatric; thyroid carcinoma

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Pediatric papillary thyroid carcinomas (PTCs) are more invasive than adult PTCs. Younger children with PTC present with more extensive disease burden and a higher likelihood of nodal and distant metastases at the time of diagnosis, although survival is high.
Introduction: Pediatric papillary thyroid carcinomas (PTCs) are more invasive than adult PTCs. No large, contemporary cohort study has been conducted to determine whether younger children are at higher risk for advanced disease at presentation compared to adolescents. We aimed to describe pediatric PTC and contextualize its characteristics with a young adult comparison cohort.Methods: The National Cancer Database was interrogated for pediatric and young adult PTCs diagnosed between 2004 and 2017. Clinical variables were compared between prepubertal (<= 10 years old), adolescent (11-18 years old), and young adult (19-39 years old) groups. Multivariable logistic regression modeling for independent predictors of metastases was conducted. A subanalysis of microcarcinomas (size <= 10 mm) was performed.Results: A total of 4860 pediatric (prepubertal n = 274, adolescents n = 4586) and 101,159 young adult patients were included. Prepubertal patients presented with more extensive burden of disease, including significantly larger primary tumors, higher prevalence of nodal and distant metastases, and increased frequency of features such as lymphovascular invasion, and extrathyroidal extension (ETE). Prepubertal age was an independent predictor of positive regional nodes (adjusted odds ratio [AOR] = 1.36 [95% confidence interval {CI} 1.01-1.84], p = 0.04) and distant metastatic disease (AOR = 3.12 [CI 1.96-4.96], p < 0.001). However, there was no difference in survival between groups (p = 0.32). Prepubertal age independently predicted lymph node metastases for microcarcinomas (AOR = 2.19 [CI 1.10-4.36], p = 0.03). Prepubertal (n = 41) versus adolescent (n = 937) patient age was associated with gross ETE (p = 0.004), even with primary tumors <= 1 cm in size.Conclusions: Patients aged <11 years old present with more advanced disease than adolescents, with a higher likelihood of nodal and distant metastatic disease at time of diagnosis, although survival is high. Prepubertal children undergo more extensive treatment, likely reflective of more invasive disease at the outset, even in the setting of a subcentimeter primary tumor.

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