Table 3.

Volumetric characteristics of loco-regionally failed (LRF) vs loco-regionally controlled (LRC) patients without vs with late term reactions grade 3/4.

	LRF	LRC, G 0–2	LRC, G 3–4
n	21	77	14*
GTV PT (cc)	63	32	31.4
GTV LN (cc)	8.5	15	13
PTV1 (cc)	174	154	176
% PTV1 >110 %	0.8	0.8	1.3
% PTV1 < 95 %	13.5	8.3	8.0

Gross tumor volume (GTV) in LRF patients was significantly larger than in controlled LRC individuals (p < 0.01). Isodose comparison showed PTV1 in controlled patients tendentially better covered, with less volumes getting doses < 95 %, compared with failed patients.

* : the 2 patients with xerostomia grade 3 and the 3 patients with ulcers related to tumor persistence were excluded from this analysis.