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Computed tomography appearances of local recurrence after stereotactic body radiation therapy for stage I non-small-cell lung carcinoma

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Abstract

Purpose

The aim of this study was to characterize computed tomography (CT) manifestations of local recurrence after stereotactic body radiation therapy (SBRT) for stage I non-small-cell lung cancer (NSCLC).

Materials and methods

A total of 27 stage I NSCLC patients who were treated with SBRT, including 5 patients with local recurrence, were retrospectively analyzed for serial CT examinations.

Results

A bulging margin appeared in 4 of the 5 cases (80%) with local recurrence and 1 of 22 cases (5%) without local recurrence. Air bronchograms were seen in 3 of 5 cases with local recurrence and 21 of 22 cases without local recurrence, but they subsequently disappeared in all 3 cases (100%) with local recurrence and in 4 of the 21 cases (19%) without local recurrence. Ipsilateral pleural effusion was observed in all 5 cases (100%) with local recurrence and in 5 of 22 cases (22%) without local recurrence. The opacity increased in size even after 12 months from the completion of SBRT in cases with local recurrence, whereas it decreased or did not change in size in cases without recurrence.

Conclusion

Local recurrence should be suspected on CT when there was (1) a bulging margin, (2) disappearance of air bronchograms, (3) appearance of pleural effusion, or (4) increase in the abnormal opacity after 12 months.

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Authors and Affiliations

  1. Department of Radiology, University of Yamanashi, 1110 Shimogato, Chuo, 409-3898, Japan

    Satoshi Kato, Atsushi Nambu, Hiroshi Onishi, Kan Marino & Tsutomu Araki

  2. Department of Radiology, Yamanashi Prefectural Central Hospital, Yamanashi, Japan

    Akitoshi Saito & Kengo Kuriyama

  3. Department of Radiology, Kofu Municipal Hospital, Kofu, Japan

    Takafumi Komiyama

Authors
  1. Satoshi Kato
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  2. Atsushi Nambu
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  3. Hiroshi Onishi
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  4. Akitoshi Saito
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  5. Kengo Kuriyama
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  6. Takafumi Komiyama
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  7. Kan Marino
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  8. Tsutomu Araki
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Corresponding author

Correspondence to Satoshi Kato.

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Cite this article

Kato, S., Nambu, A., Onishi, H. et al. Computed tomography appearances of local recurrence after stereotactic body radiation therapy for stage I non-small-cell lung carcinoma. Jpn J Radiol 28, 259–265 (2010). https://doi.org/10.1007/s11604-009-0415-3

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  • DOI: https://doi.org/10.1007/s11604-009-0415-3

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