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Oncologic Outcomes of T1–T2N0 Glottic Cancer Treatment: Single Center Experiences of 417 Patients Over 20 Years

Choi Sung Young|Chung Man Ki|Ahn Yong Chan|Oh Dongryul|Son Young-Ik
대한후두음성언어의학회 (Korean Society of Laryngology, Phoniatrics and Logopedics)|2023.09|대한후두음성언어의학회지 (Journal of Korean Society of Laryngology, Phoniatrics and Logopedics)|제34권 제2호|pp. 36-44|DOI 10.22469/jkslp.2023.34.2.36

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키워드

Treatment outcomeRadiation therapySurgerySquamous cell carcinomaEarly glottic cancerLarynx cancer

초록

Background and Objectives For T1–T2 early glottic cancer, single modality treatment with radiation therapy (RT) or transoral laser microsurgery is the standard therapeutic option. However, the choice between surgery and RT has been debated for decades. Even though patient selection bias for each modality inherently exists in the retrospective study, this study aimed to compare the oncologic outcomes of the actual treatment of these patients between surgery-based treatment and RT.Materials and Method The medical records of 417 patients with T1–T2N0 glottic squamous cell carcinoma were reviewed who were treated at our institution between 1995 and 2014. The patients were divided into two groups; primarily surgery-based treatment (OP, n=209) or RT (n=208).Results In the T1 stage, local failure, overall survival (OS), and disease-free survival (DFS) rates were not different between the OP and RT groups. However, in the T2 stage, the local failure rate was higher in the RT group (p<0.01). OS and DFS were higher in the OP group (p=0.019 and p=0.004, respectively). Larynx-preservation rate was similar in both groups (97.1% and 96.2%, p=0.576). Multivariate analysis showed that age (>65), presence of multiple primary cancer, and treatment modality were significant variables influencing OS and DFS.Conclusion Surgery-based treatment provided better local control rates, DFS, and OS in patients with T1–T2N0 glottic SCC. In the T1 stage, treatment outcomes were similar between OP and RT groups. In the T2 stage, OP showed better results than RT, suggesting that refined strategies are required to improve the oncologic outcomes of RT for T2 glottic cancer.

Abstract

Background and Objectives For T1–T2 early glottic cancer, single modality treatment with radiation therapy (RT) or transoral laser microsurgery is the standard therapeutic option. However, the choice between surgery and RT has been debated for decades. Even though patient selection bias for each modality inherently exists in the retrospective study, this study aimed to compare the oncologic outcomes of the actual treatment of these patients between surgery-based treatment and RT.Materials and Method The medical records of 417 patients with T1–T2N0 glottic squamous cell carcinoma were reviewed who were treated at our institution between 1995 and 2014. The patients were divided into two groups; primarily surgery-based treatment (OP, n=209) or RT (n=208).Results In the T1 stage, local failure, overall survival (OS), and disease-free survival (DFS) rates were not different between the OP and RT groups. However, in the T2 stage, the local failure rate was higher in the RT group (p<0.01). OS and DFS were higher in the OP group (p=0.019 and p=0.004, respectively). Larynx-preservation rate was similar in both groups (97.1% and 96.2%, p=0.576). Multivariate analysis showed that age (>65), presence of multiple primary cancer, and treatment modality were significant variables influencing OS and DFS.Conclusion Surgery-based treatment provided better local control rates, DFS, and OS in patients with T1–T2N0 glottic SCC. In the T1 stage, treatment outcomes were similar between OP and RT groups. In the T2 stage, OP showed better results than RT, suggesting that refined strategies are required to improve the oncologic outcomes of RT for T2 glottic cancer.

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