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Treatment strategy of papillary thyroid carcinoma in children and adolescents: clinical significance of the initial nodal manifestation.
Annals of Surgical Oncology 2009 December
BACKGROUND: Risk factors and treatment strategy in younger patients with papillary thyroid carcinoma are still controversial.
METHODS: We reviewed 120 consecutive papillary thyroid carcinoma patients younger than 20 years who underwent initial surgery between 1977 and 2004 (14 male and 106 female subjects; mean age, 16.3 years; mean follow-up, 11.6 years). Outcomes were evaluated initially, and risk factors for disease-free survival (DFS) were analyzed statistically. Cox proportional multivariate analysis revealed that initial nodal manifestation (P < .001, hazard ratio 2.97) was the most statistically significant risk factor for DFS. The outcomes were then compared between four subgroups on the basis of the initial nodal manifestation and node dissection: 17 patients in group A (no lymphadenopathy, no or only prophylactic central dissection), 30 patients in group B (no lymphadenopathy, prophylactic modified neck dissection, MND), 46 patients in group C (nonpalpable lymphadenopathy detected by radiological or operative findings, therapeutic MND), and 27 patients in group D (palpable lymphadenopathy, therapeutic MND).
RESULTS: Subtotal/total thyroidectomy and radioactive iodine therapy were performed for 47.1 and 0% in group A, 33.3 and 0% in group B, 43.4 and 10.9% in group C, and 85.1 and 48.1% in group D, respectively. In groups A, B, C, and D, 0%, 3.3%, 28.3%, and 48.1% developed recurrence, respectively (P < .001). DFS Kaplan-Meier curves differed significantly among the four subgroups (P < .0005).
CONCLUSIONS: Initial nodal manifestation is useful to predict DFS in younger papillary thyroid carcinoma patients. Our findings will be beneficial to determine the treatment strategy. Conservative therapy is considered acceptable for patients without risk factors.
METHODS: We reviewed 120 consecutive papillary thyroid carcinoma patients younger than 20 years who underwent initial surgery between 1977 and 2004 (14 male and 106 female subjects; mean age, 16.3 years; mean follow-up, 11.6 years). Outcomes were evaluated initially, and risk factors for disease-free survival (DFS) were analyzed statistically. Cox proportional multivariate analysis revealed that initial nodal manifestation (P < .001, hazard ratio 2.97) was the most statistically significant risk factor for DFS. The outcomes were then compared between four subgroups on the basis of the initial nodal manifestation and node dissection: 17 patients in group A (no lymphadenopathy, no or only prophylactic central dissection), 30 patients in group B (no lymphadenopathy, prophylactic modified neck dissection, MND), 46 patients in group C (nonpalpable lymphadenopathy detected by radiological or operative findings, therapeutic MND), and 27 patients in group D (palpable lymphadenopathy, therapeutic MND).
RESULTS: Subtotal/total thyroidectomy and radioactive iodine therapy were performed for 47.1 and 0% in group A, 33.3 and 0% in group B, 43.4 and 10.9% in group C, and 85.1 and 48.1% in group D, respectively. In groups A, B, C, and D, 0%, 3.3%, 28.3%, and 48.1% developed recurrence, respectively (P < .001). DFS Kaplan-Meier curves differed significantly among the four subgroups (P < .0005).
CONCLUSIONS: Initial nodal manifestation is useful to predict DFS in younger papillary thyroid carcinoma patients. Our findings will be beneficial to determine the treatment strategy. Conservative therapy is considered acceptable for patients without risk factors.
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