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Article

A retrospective analysis of radiotherapy in the treatment of external auditory canal carcinoma

  • Authors:
    • Atsuto Katano
    • Ryousuke Takenaka
    • Hideomi Yamashita
    • Mizuo Ando
    • Masafumi  Yoshida
    • Yuki Saito
    • Takahiro Asakage
    • Osamu Abe
    • Keiichi Nakagawa
  • View Affiliations / Copyright

    Affiliations: Department of Radiology, The University of Tokyo Hospital, Bunkyo‑ku, Tokyo 113‑8655, Japan, Department of Otolaryngology, The University of Tokyo Hospital, Bunkyo‑ku, Tokyo 113‑8655, Japan, Department of Head and Neck Surgery, Tokyo Medical and Dental University, Tokyo 113‑8510, Japan
  • Article Number: 45
    |
    Published online on: January 13, 2021
       https://doi.org/10.3892/mco.2021.2207
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Abstract

External auditory canal carcinoma (EACC) is a rare disease. The current study aimed to evaluate the clinical outcomes of patients treated with external beam radiotherapy (EBRT) for EACC. The present study retrospectively reviewed 34 consecutive patients treated for EACC with EBRT between February 2001 and January 2019 at the University of Tokyo Hospital. Clinical staging was performed according to the modified Pittsburgh classification. Of all the included patients, seven patients were in the early stages (I or II) and 27 in the advanced stages (III or IV) of EACC. A total of 16 patients underwent EBRT and surgery (S+RT) pre‑ and/or postoperatively, while 18 patients underwent definitive radiotherapy (dRT). The median prescribed doses for the S+RT and dRT groups were 66 and 70 Gy, respectively. The median follow‑up period for all patients was 22.4 months (range, 2‑205 months). The 5‑year overall survival rates of the S+RT and dRT groups were 66.7 and 45.1%, respectively. The progression‑free survival rate at 5‑year was 55.6% (95% confidence interval: 36.5‑71.1%) for the entire cohort. A total of 14 patients experienced disease relapse after treatment, consisting of 11 locoregional recurrences and three distant metastases. The current study revealed the clinical outcomes of EBRT for EACC.
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Copy and paste a formatted citation
Spandidos Publications style
Katano A, Takenaka R, Yamashita H, Ando M, Yoshida M, Saito Y, Asakage T, Abe O and Nakagawa K: A retrospective analysis of radiotherapy in the treatment of external auditory canal carcinoma. Mol Clin Oncol 14: 45, 2021.
APA
Katano, A., Takenaka, R., Yamashita, H., Ando, M., Yoshida, M., Saito, Y. ... Nakagawa, K. (2021). A retrospective analysis of radiotherapy in the treatment of external auditory canal carcinoma. Molecular and Clinical Oncology, 14, 45. https://doi.org/10.3892/mco.2021.2207
MLA
Katano, A., Takenaka, R., Yamashita, H., Ando, M., Yoshida, M., Saito, Y., Asakage, T., Abe, O., Nakagawa, K."A retrospective analysis of radiotherapy in the treatment of external auditory canal carcinoma". Molecular and Clinical Oncology 14.3 (2021): 45.
Chicago
Katano, A., Takenaka, R., Yamashita, H., Ando, M., Yoshida, M., Saito, Y., Asakage, T., Abe, O., Nakagawa, K."A retrospective analysis of radiotherapy in the treatment of external auditory canal carcinoma". Molecular and Clinical Oncology 14, no. 3 (2021): 45. https://doi.org/10.3892/mco.2021.2207
Copy and paste a formatted citation
x
Spandidos Publications style
Katano A, Takenaka R, Yamashita H, Ando M, Yoshida M, Saito Y, Asakage T, Abe O and Nakagawa K: A retrospective analysis of radiotherapy in the treatment of external auditory canal carcinoma. Mol Clin Oncol 14: 45, 2021.
APA
Katano, A., Takenaka, R., Yamashita, H., Ando, M., Yoshida, M., Saito, Y. ... Nakagawa, K. (2021). A retrospective analysis of radiotherapy in the treatment of external auditory canal carcinoma. Molecular and Clinical Oncology, 14, 45. https://doi.org/10.3892/mco.2021.2207
MLA
Katano, A., Takenaka, R., Yamashita, H., Ando, M., Yoshida, M., Saito, Y., Asakage, T., Abe, O., Nakagawa, K."A retrospective analysis of radiotherapy in the treatment of external auditory canal carcinoma". Molecular and Clinical Oncology 14.3 (2021): 45.
Chicago
Katano, A., Takenaka, R., Yamashita, H., Ando, M., Yoshida, M., Saito, Y., Asakage, T., Abe, O., Nakagawa, K."A retrospective analysis of radiotherapy in the treatment of external auditory canal carcinoma". Molecular and Clinical Oncology 14, no. 3 (2021): 45. https://doi.org/10.3892/mco.2021.2207
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