Fractionated stereotactic radiation therapy for adrenal metastases: contributing to local tumor control with low toxicity.
Strahlenther Onkol
; 195(3): 236-245, 2019 Mar.
Article
em En
| MEDLINE
| ID: mdl-30374590
ABSTRACT
PURPOSE:
To report on the Erlangen (UK-Er) experience with linear accelerator stereotactic body radiation therapy (LINAC SBRT) for adrenal metastasis from various primary tumors. MATERIALS ANDMETHODS:
33 patients were treated. Primary sites included lung (nâ¯= 19), melanoma (nâ¯= 8), colorectal (nâ¯= 2), hepatocellular (nâ¯= 1), esophageal (nâ¯= 2), and breast cancer (nâ¯= 1). 14 patients were treated palliatively, 19 patients were treated with local curative intent. RADIATION TREATMENT Treatment planning was done based on an exhale, mid-ventilation, and inspiration CT series. Further planning CTs were done to check for the correctness of the breathing pattern. Irradiation was performed using a NOVALIS (Varian, Palo Alto, CA, USA; Brainlab AG, München, Germany) linear accelerator. The isocenter was verified before each treatment session using the BrainLab ExacTrac® (Brainlab AG, München, Germany) system to minimize setup errors. Dose was prescribed to the planning target volume (PTV) surrounding 90% isodose. FOLLOW-UP Depending on their overall performance status and prognosis, patients received clinical check-ups and radiological imaging. Median follow-up was 11 months. STATISTICALANALYSIS:
IBM SPSS v. 24 was used for univariate analysis using Kaplan-Meier curves, nonparametric Kruskal-Wallis test, and the chi-square test for frequency distributions. Toxicity was graded according to NCI CTCAE v4.0. Depending on radiologic imaging, patients were classified as stable, regression, and progression.RESULTS:
Median survival was 11 months, median PFS was 5 months. Median local failure-free survival was 21 months. Patients who were treated with curative intent showed a better survival curve (pâ¯< 0.0001) and PFS (pâ¯= 0.004). BED ranged from 42 to 108.8â¯Gy, median BED was 67.2â¯Gy. Three BED groups were formed. Overall survival curves differed significantly (pâ¯= 0.046), favoring the high-dose group. 21 patients were free from any adverse events or discomfort. In 7 cases, a grade I toxicity was noted.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Radiocirurgia
/
Neoplasias das Glândulas Suprarrenais
Limite:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Strahlenther Onkol
Assunto da revista:
NEOPLASIAS
/
RADIOTERAPIA
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Alemanha