Cancer Research and Treatment

Original Articles

Radiotherapy Versus Cordectomy in the Management of Early Glottic Cancer: Seung Yeun Chung, Kyung Hwan Kim, Ki Chang Keum, Yoon Woo Koh, Se-Heon Kim, Eun Chang Choi, Chang Geol Lee; Cancer Res Treat. 2018;50(1):156-163. Published online March 17, 2017; DOI: https://doi.org/10.4143/crt.2016.503

Purpose
The purpose of this study was to compare the treatment outcomes of definitive radiotherapy (RT) with cordectomy in patients with early glottic cancer.
Materials and Methods
A total of 165 patientswhowere diagnosedwith T1/2 squamous cell carcinoma of the glottic larynx between January 2006 and December 2012 were retrospectively analyzed. A total of 112 patients received RT and 53 patients received cordectomy. Local control (LC), disease-free survival (DFS), overall survival (OS), and larynx preservation rates after RT and cordectomy were investigated.
Results
The median follow-up period was 77.7 months (range, 10.7 to 127.0 months). The 3- and 5-year LC rates were 91.9% and 89.9%, respectively, for the RT group, and 82.8% and 73.2%, respectively, for the cordectomy group (p=0.006). The 3- and 5-year DFS rates were 87.5% and 83.7%, respectively, for the RT group and 79.2% and 68.0%, respectively, for the cordectomy group (p=0.046). No significant differences were identified in the 5-year OS (92.8% vs. 90.6%, p=0.713) or larynx preservation rates (98.2% vs. 97.2%, p=0.831) between groups. The major failure pattern was local failure (n=26), followed by regional (n=3) and distant failure (n=2). Multivariate analysis of LC showed that T2 stage (p=0.012) and receiving cordectomy as initial treatment (p=0.001) were significantly associated with poorer LC.
Conclusion
RT resulted in higher rates of LC and DFS compared to cordectomy for early glottic cancer. Treatment with radiotherapy is feasible and should be encouraged for both T1 and T2 glottic cancer.

Citations

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Long-Term Outcome of Definitive Radiotherapy for Early Glottic Cancer: Prognostic Factors and Patterns of Local Failure: Yu Jin Lim, Hong-Gyun Wu, Tack-Kyun Kwon, J. Hun Hah, Myung-Whun Sung, Kwang Hyun Kim, Charn Il Park; Cancer Res Treat. 2015;47(4):862-870. Published online February 13, 2015; DOI: https://doi.org/10.4143/crt.2014.203

Abstract PDF PubReader ePub

Purpose
This study evaluates the long-term results of definitive radiotherapy (RT) for early glottic cancer. Clinical and treatment factors related to local control and patterns of failure are analyzed. Materials and Methods We retrospectively reviewed 222 patients with T1-2N0 squamous cell carcinoma of the glottic larynx treated with definitive RT from 1981 to 2010. None of the patients received elective nodal RT or combined chemotherapy. The median total RT dose was 66 Gy. The daily fraction size was < 2.5 Gy in 69% and 2.5 Gy in 31% of patients. The RT field extended from the hyoid bone to the cricoid cartilage.
Results
The median age was 60 years, and 155 patients (70%) had T1 disease. The 5-year rates of local recurrence-free survival (LRFS) and ultimate LRFS with voice preservation were 87.8% and 90.3%, respectively. T2 (hazard ratio [HR], 2.30; 95% confidence interval [CI], 1.08 to 4.94) and anterior commissural involvement (HR, 3.37; 95% CI, 1.62 to 7.02) were significant prognostic factors for LRFS. In 34 patients with local recurrence, tumors recurred in the ipsilateral vocal cord in 28 patients. There were no contralateral vocal cord recurrences. Most acute complications included grade 1-2 dysphagia and/or hoarseness. There was no grade 3 or greater chronic toxicity.
Conclusion
Definitive RT achieved a high cure rate, voice preservation, and tolerable toxicity in early glottic cancer. T2 stage and anterior commissural involvement were prognostic factors for local control. Further optimization of the RT method is needed to reduce the risk of ipsilateral tumor recurrence.

Citations

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