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  • Title: Postoperative [¹²⁵I] seed brachytherapy in the treatment of acinic cell carcinoma of the parotid gland: with associated risk factors.
    Author: Mao MH, Zhang JG, Zhang J, Zheng L, Liu SM, Huang MW, Shi Y.
    Journal: Strahlenther Onkol; 2014 Oct; 190(11):1008-14. PubMed ID: 24781865.
    Abstract:
    BACKGROUND: This retrospective study was undertaken to analyze data from patients receiving iodine-125 ([(125)I]) seed brachytherapy postoperatively for the treatment of acinic cell carcinoma (ACC) of the parotid gland along with the following risk factors: residual tumor, recurrent tumor, facial nerve invasion, positive resection margins, advanced tumor stage, or tumor spillage. PATIENTS AND METHODS: Twenty-nine patients with ACC (17 females, 12 males; age range, 13-73 years; median age, 37.3 years) were included. Median follow-up was 58.2 months (range, 14-122 months). Patients received [(125)I] seed brachytherapy (median actuarial D90, 177 Gy) 3-41 days (median, 14 days) following surgery. Radioactivity was 18.5-33.3 MBq per seed, and the prescription dose was 80-120 Gy. RESULTS: The 3-, 5-, and 10-year rates of local control were 93.1, 88.7, and 88.7 %, respectively; overall survival was 96.6, 92, and 92 %; disease-free survival was 93.1, 88.4, and 88.4 %; and freedom from distant metastasis was 96.6, 91.2, and 91.2 %. Lymph node metastases were absent in all patients, although two patients died with distant metastases. Facial nerve recovery was quick, and no severe radiotherapy-related complications were noted. Recurrence history, local recurrence, and distant metastasis significantly affected overall survival. CONCLUSION: Postoperative [(125)I] seed brachytherapy is effective in treating ACC and has minor complications. Patients with a history of recurrence showed poor prognosis and were more likely to experience disease recurrence and develop metastases.
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