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. 2009 Jun;91(3):296-300.
doi: 10.1016/j.radonc.2009.02.011. Epub 2009 Mar 16.

Stereotactic radiotherapy with real-time tumor tracking for non-small cell lung cancer: clinical outcome

Noëlle C van der Voort van Zyp  1 , Jean-Briac Prévost, Mischa S Hoogeman, John Praag, Bronno van der Holt, Peter C Levendag, Robertus J van Klaveren, Peter Pattynama, Joost J Nuyttens
Affiliations

Stereotactic radiotherapy with real-time tumor tracking for non-small cell lung cancer: clinical outcome

Noëlle C van der Voort van Zyp et al. Radiother Oncol. 2009 Jun.

Abstract

Purpose: To report the clinical outcome of treatment using real-time tumor tracking for 70 patients with inoperable stage I non-small cell lung cancer (NSCLC).

Materials and methods: Seventy inoperable patients with peripherally located early-stage NSCLC were treated with 45 or 60 Gy in three fractions using CyberKnife. Pathology was available in 51% of patients. Thirty-nine patients had a T1-tumor and 31 had a T2-tumor. Markers were placed using the vascular, percutaneous intra-, or extra-pulmonary approach, depending on the risk of pneumothorax.

Results: The actuarial 2-year local control rate for patients treated with 60 Gy was 96%, compared to 78% for patients treated with a total dose of 45 Gy (p=0.197). All local recurrences (n=4) occurred in patients with T2-tumors. Overall survival for the whole group at two years was 62% and the cause specific survival was 85%. The median follow-up was 15 months. Grade 3 toxicity occurred in two patients (3%) after marker placement. Treatment-related late grade 3 toxicity occurred in 7 patients (10%). No grade > or = 4 toxicity occurred.

Conclusion: Excellent local control of 96% at 1- and 2-years was achieved using 60 Gy in three fractions for NSCLC patients treated with the real-time tumor tracking. Toxicity was low.

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