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The Role of Postoperative External Beam Radiotherapy in Differentiated Thyroid Cancer with Focal Anaplastic Change

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Authors
Jang, W.; Wu, H.; Park, C. I.; Youn, Y.; Kwon, T.; Chung, J.; Jung, K.; Kang, K. W.; Park, D. J.; Kim, K. H.
Issue Date
2010
Publisher
ELSEVIER SCIENCE INC
Citation
INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS; Vol.78 3; S432-S432
Abstract
Purpose/Objective(s): To determine the role of postoperative external-beam radiotherapy (EBRT) in the patients with differentiated
thyroid cancer with focal anaplastic change.
Materials/Methods: Of the 6,345 patients diagnosed as thyroid cancer at our institution between January 1980 and June 2008,
115 had anaplastic thyroid carcinoma. Of these patients, 33 had focal anaplastic change. The median patient age was 51 years
(range, 22-75 years). The majority of patients were female (75.8%) and had extrathyroidal tumors (72.7%). Two patients
(6.1%) had distant metastasis at diagnosis. Total thyroidectomy was achieved in 25 patients (75.8%). Twenty patients
(60.6%) received postoperative EBRT (EBRT group) to a median total dose of 61.2 Gy (range, 54-70 Gy) and 11 (33.3%)
received radioactive iodine ablation alone (no-EBRT group). The median follow-up duration was 19 months (range, 2-130
months).
Results: The 5-year overall and disease-free survival rates were 96.2% and 57.2%, respectively. The 5-year local failure-free survival
rates were significantly different (100% in the EBRT and 52.5% in the no-EBRT; p = 0.024). There were no significant
difference in overall, disease-free, regional failure-free, and distant metastasis-free survival rates between the EBRT group and
no-EBRT group. Thyroglobulin, anaplastic transformation from previous differentiated thyroid cancer, and multiple foci were significant
prognostic factors.
Conclusions: Postoperative EBRT significantly improved local failure-free survival in patients with differentiated thyroid cancer
with focal anaplastic change.
ISSN
0360-3016
Language
English
URI
https://hdl.handle.net/10371/77534
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College of Medicine/School of Medicine (의과대학/대학원)Internal Medicine (내과학전공)Journal Papers (저널논문_내과학전공)
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