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http://dx.doi.org/10.21593/kjhno/2020.36.2.9

Age and Tumor Size is a Prognostic Factor in Pediatric/Adolescent Differentiated Thyroid Carcinoma  

Byun, Byung Hyun (Department of Nuclear Medicine, Korea Cancer Center Hospital)
Lee, Guk Haeng (Department of Otolaryngology, Korea Cancer Center Hospital)
Kim, Dong Ho (Department of Pediatrics, Korea Cancer Center Hospital)
Lim, Jung Sub (Department of Pediatrics, Korea Cancer Center Hospital)
Lim, Ilhan (Department of Nuclear Medicine, Korea Cancer Center Hospital)
Lim, Sang Moo (Department of Nuclear Medicine, Korea Cancer Center Hospital)
Lee, Byeong Cheol (Department of Otolaryngology, Korea Cancer Center Hospital)
Lee, Jun Ah (Department of Pediatrics, Korea Cancer Center Hospital)
Publication Information
Korean Journal of Head & Neck Oncology / v.36, no.2, 2020 , pp. 9-15 More about this Journal
Abstract
Background/Objectives: To analyze the clinical characteristics of differentiated thyroid cancer (DTC) in children and adolescents. Materials & Methods: Medical records of 31 DTC cases that were diagnosed and treated at Korea Cancer Center Hospital between 2002 and 2018 were retrospectively reviewed. Results: Most cases were papillary carcinoma (n=26), with female predominance (n=25). Median age was 16.4 years (range, 11.9-18.6 years). Extrathyroidal extension was present in 24 cases. Twenty cases had tumor involvement at cervical lymph nodes and three had lung metastasis. Twenty-two patients received radioactive iodide treatment with a median cumulative dose of 300 mCi (range, 100-920 mCi). During a median follow-up of 68.2 months (range, 2.3-191.4 months), serum thyroglobulin level was elevated in 15 patients. Among them, two cases had remnant thyroid tissue, 4 had recurrence at cervical lymph nodes, and the remaining 9 did not have any detectable lesion. All were alive, and 5-year event-free survival (EFS) was 45.2±10.1%. Age £15 years, tumor size, lymph node status (N1b), and distant metastasis had negative effects on EFS. On multivariate analysis, age and tumor size had prognostic significance. Conclusion: For DTC of children and adolescents (£18 years old), age ≤15 years and tumor size were prognostic factor. Therefore, patients in this age group need meticulous follow-up. Further studies are necessary to answer the potential influence of age on the incidence and behavior of DTC.
Keywords
Thyroid carcinoma; Children; Adolescent; Prognosis;
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