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.

Studer et al. Radiation Oncology 2006 1:7   doi:10.1186/1748-717X-1-7

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