ATP Barcelona 2017

Hard data: microscopic extensions in lung cancer 30% patients with low grade tumors (now N=32

0 10 20 30 40 50 60 70 80 90 100 0 5 10 15 20 25 30 35 40 45 distance from GTV [mm] % cases with extensions Deformation corrected

treated with SBRT with few mm margins), have spread at 15 mm distance

100% 50% 25%

Having dose there may be essential!

Slide courtesy of Gilhuijs and Stroom, NKI