Effectiveness and toxicities of intensity-modulated radiotherapy for patients with locally recurrent nasopharyngeal carcinoma.
PLoS One
; 8(9): e73918, 2013.
Article
en En
| MEDLINE
| ID: mdl-24040115
PURPOSE: To analyze the effectiveness and toxicities in the re-irradiation of locally recurrent nasopharyngeal carcinoma (NPC) using intensity-modulated radiotherapy (IMRT). METHODS: This is a retrospective analysis of 54 NPC patients with local recurrence re-irradiated with IMRT. The re-staging for rT1, rT2, rT3, rT4 were 3 (5.6%), 8 (14.8%), 9 (16.7%), 34 (63%) respectively. The average dose to GTV was 69.95 Gy (49.8-76.58 Gy), the average BED(3Gy) was 116.8 Gy (83.5-127.9 Gy). V95 was 96%, and D95 was 65.75 Gy. 33.3% of them received concurrent chemoradiotherapy. RESULTS: Median overall survival (OS) was 21 months (1-93 mon). The 1-, 2-year local progression free survival (LPFS) rate was 84.5%, 64% and OS rate was 71.7%, 44.3%. Severe late adverse events (SLAE) occurred in 48.1% of patients, including 31.5% with ulcer or necrosis of the nasopharyngeal mucosa, 20.4% with difficulty in feeding, 18.5% with temporal lobe necrosis, 11.1% with massive hemorrhage. 15.4% died of local regional progression, 5.8% died of distant metastasis, 25% died of SLAE, 9.6% died of both local regional progression and SLAE that could not be differentiated, 5.8% died of other medical complications. Concurrent chemoradiotherapy was the independent negative prognostic factors for LPFS; PTV>100 ml was a predictive factor of poor OS; patients with invasion of post-styloid space were at higher risk of SLAE. CONCLUSIONS: The present study demonstrated that IMRT with 70Gy was efficient for local tumor control. However, we observed a high frequency of serious late complications. More optimized combination treatment and patient selection are required to achieve excellent local control without significant late morbidities in locally recurrent NPC.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Neoplasias Nasofaríngeas
/
Radioterapia de Intensidad Modulada
Tipo de estudio:
Diagnostic_studies
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Observational_studies
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Prognostic_studies
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Risk_factors_studies
Límite:
Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
PLoS One
Asunto de la revista:
CIENCIA
/
MEDICINA
Año:
2013
Tipo del documento:
Article
País de afiliación:
China
Pais de publicación:
Estados Unidos