Feasibility and efficacy of cyberknife radiotherapy for lung cancer: early results

Cancer radiothérapie : journal de la Société française de radiothérapie oncologique
J CastelliP-Y Bondiau

Abstract

High-dose robotic stereotactic irradiation can be achieved with high precision using the CyberknifeM system equipped with the Synchrony respiratory tracking device. Cyberknife irradiation can overcome some limitations of conventional radiotherapy including errors due to breathing motion and patient setup. High dose levels are of interest for tumours that have shown a dose-response relationship including lung tumours. We reviewed the treatments and outcomes for the first French patients with lung tumours treated at the Cyberknife centre of Nice. Thirty four patients were treated between November 2006 and November 2007 at the Cyberknife centre of Nice, Centre Lacassagne, France. Thirty had untreated primary lung cancer, 4 had colorectal metastasis to the lung. We evaluated the feasibility and reliability of fiducial placement, toxicity and early outcomes. Objective tumour response was assessed on thoracic CT scan every three months. There was no grade 3-4 toxicity. Toxicity (11%) mainly consisted of grade 1-2 asthenia. Crude overall tumour response rate was 96% for all assessable patients and 91% at 3 and 6 months, respectively. The use of one fiducial ensured minimal toxicity (no grade III pneumothorax) while allowing reliable t...Continue Reading

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