Purpose: We aimed to investigate outcomes of locoregional radiation therapy (XRT) in parathyroid carcinoma (PC) patients at a single institution over 35 years.
Methods and materials: Retrospective review of PC patients who received postoperative locoregional XRT (1980-2015). Patients were grouped according to XRT after PC initial operation or after salvage surgery. All patients with a histopathological diagnosis of PC who had postoperative locoregional XRT at our institution were included. All patients with a histopathological diagnosis of uncertain malignancy, suggestive for malignancy, or atypical parathyroid tumors and those who had XRT outside our institution were excluded.
Results: Eight patients received XRT, 4 in each group, with a median follow-up of 12.5 years. The 4 patients who had XRT after initial surgery all had an oncologic operation, including ipsilateral thyroid lobectomy and central neck dissection, and all of these patients were disease-free at last follow-up. Of the 4 patients who received XRT after salvage surgery, only 1 remained disease free. There were no major complications/long-term side effects associated with XRT.
Conclusions: XRT is well tolerated as postoperative locoregional treatment of patients with PC. Whether it is needed, and the timing of administering XRT, remains to be established.
Copyright © 2017 American Society for Radiation Oncology. Published by Elsevier Inc. All rights reserved.