1. Adding concurrent chemotherapy to postoperative radiotherapy improves locoregional control but Not overall survival in patients with salivary gland adenoid cystic carcinoma-a propensity score matched study.
- Author
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Cheng-En Hsieh, Chien-Yu Lin, Li-Yu Lee, Lan-Yan Yang, Chun-Chieh Wang, Hung-Ming Wang, Tung-Chieh Chang, Joseph, Kang-Hsing Fan, Chun-Ta Liao, Tzu-Chen Yen, Ku-Hao Fang, Yan-Ming Tsang, Hsieh, Cheng-En, Lin, Chien-Yu, Lee, Li-Yu, Yang, Lan-Yan, Wang, Chun-Chieh, Wang, Hung-Ming, Chang, Joseph Tung-Chieh, and Fan, Kang-Hsing
- Subjects
ADENOID cystic carcinoma ,SALIVARY gland cancer ,CANCER chemotherapy ,CHEMORADIOTHERAPY ,RADIOTHERAPY ,THERAPEUTICS ,ANTINEOPLASTIC agents ,THERAPEUTIC use of narcotics ,ANALGESICS ,COMBINED modality therapy ,METASTASIS ,POSTOPERATIVE period ,PROBABILITY theory ,SALIVARY gland tumors ,TREATMENT effectiveness ,RETROSPECTIVE studies - Abstract
Purpose: To compare the long-term outcomes in patients with salivary gland adenoid cystic carcinoma (SGACC) treated with post-operative chemoradiotherapy (POCRT) versus post-operative radiotherapy (PORT).Methods: We retrospectively reviewed the records of 91 SGACC patients treated with surgery followed by PORT (n = 58) or POCRT (n = 33) between 2000 and 2013. Treatment outcomes between groups were compared using propensity score matching (1:1 nearest neighbor).Results: The median radiation dose was 66 Gy, and patients were followed up for a median of 71 months. Cisplatin-based concurrent regimens were the most commonly used chemotherapy schedules. In the entire study cohort, patients undergoing POCRT showed a trend toward higher locoregional control (LRC) rates than those treated with PORT alone at both 5 and 8 years (97 and 97 % versus 84 and 79 %, respectively; P = .066). Distant metastases were the most common form of treatment failure and occurred in 31 (34 %) patients (PORT, n = 17; POCRT, n = 14). After propensity score matching (33 pairs), patients receiving POCRT had 5- and 8 year LRC rates of 97 and 97 %, respectively, compared with 79 and 67 % for patients treated with PORT alone (P = .017). The two groups did not differ significantly in terms of distant metastasis-free survival (DMFS), disease-free survival (DFS), and overall survival (OS). However, a significantly better opioid-requiring pain-free survival (ORPFS) was achieved in POCRT group (P = .038). Subgroup analyses revealed that patients with stage III - IV disease (P = .040 and .017), positive surgical margins (P = .011 and .050), or perineural invasion (P = .013 and .035) had significantly higher 5- and 8 year LRC and ORPFS when treated with POCRT, respectively.Conclusions: In SGACC patients, adding concurrent chemotherapy to PORT may increase LRC and ORPFS rates, particularly in presence of stage III - IV disease, positive surgical margins, or perineural invasion. However, no significant differences in DMFS, DFS, and OS were observed. [ABSTRACT FROM AUTHOR]- Published
- 2016
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