340 / 1778
Ghadjar P, et al. IJROBP 2009
•Median ECE: 1 mm (0.4 – 9)
•Larger N – Larger ECE
Bern University Hospital
Distance of Extracapsular Extension (ECE)
H&N Cancer
231 N with ECE
>95% of cases: ECE ≤5 mm
From GTV to CTV
+5 mm?