[Importance of radiotherapy in stereotactic conditions (radiosurgery) in brain metastasis: experience and results of the Hôpital Pitié-Salpêtrière Group]. / Intérêt de la radiothérapie en conditions stéréotaxiques (radiochirurgie) des métastases cérébrales: expérience et résultats du groupe hospitalier Pitié-Salpêtrière.
Cancer Radiother
; 2(3): 272-81, 1998.
Article
em Fr
| MEDLINE
| ID: mdl-9749126
ABSTRACT
PURPOSE:
Retrospective analysis of the influence of clinical and technical factors on local control and survival after radiosurgery for brain metastasis. PATIENTS ANDMETHODS:
From January 1994 to December 1996, 42 patients presenting with 71 metastases underwent radiosurgery for brain metastasis. The median age was 56 years and the median Karnofsky index 80. Primary sites included lung (20 patients), kidney (seven), breast (five), colon (two), melanoma (three), osteosarcoma (one) and it was unknown for three patients. Seventeen patients had extracranial metastasis. Twenty-four patients were treated at recurrence which occurred after whole brain irradiation (12 patients), surgical excision (four) or after both treatments (eight). Thirty-six sessions of radiosurgery have been realized for one metastasis and 13 for two, three or four lesions. The median metastasis diameter was 21 mm and the median volume 1.7 cm3. The median peripheral dose to the lesion was 14 Gy, and the median dose at the isocenter 20 Gy.RESULTS:
Sixty-five metastases were evaluable for response analysis. The overall local control rate was 82% and the 1-year actuarial rate was 72%. In univariate analysis, theoretical radioresistance (P = 0.001), diameter less than 3 cm (P = 0.039) and initial treatment with radiosurgery (P = 0.041) were significantly associated with increased local control. Only the first two factors remained significant in multivariate analysis. No prognostic factor of overall survival was identified. The median survival was 12 months. Six patients had a symptomatic oedema (RTOG grade 2), only one of which requiring a surgical excision.CONCLUSION:
In conclusion, 14 Gy delivered at the periphery of metastasis seems to be a sufficient dose to control most brain metastases, with a minimal toxicity. Better results were obtained for lesions initially treated with radiosurgery, theoretically radioresistant and with a diameter less than 3 cm.
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Base de dados:
MEDLINE
Assunto principal:
Neoplasias Encefálicas
/
Radiocirurgia
Tipo de estudo:
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
Fr
Ano de publicação:
1998
Tipo de documento:
Article