Table 1 Patient characteristics. GTV = gross tumor volume
From: Impact of MRI on target volume definition in head and neck cancer patients
Group | (A) No relevant change | (B) Relevant change | (C) All patients |
|---|---|---|---|
Number of patients | 5 | 11 | 16 |
Stage | |||
T2 | 2 (40%) | 2 (18%) | 4 (25%) |
T3 | 2 (40%) | 4 (36%) | 6 (38%) |
T4 | 1 (20%) | 5 (45%) | 6 (38%) |
Grading | |||
G2 | 2 (40%) | 7 (64%) | 9 (56%) |
G3 | 2 (40%) | 3 (27%) | 5 (31%) |
Unknown | 1 (20%) | 1 (9%) | 2 (13%) |
Localization | |||
Tonsil | 3 (60%) | 6 (55%) | 9 (56%) |
Base of tongue | 2 (40%) | 2 (18%) | 4 (25%) |
Hypopharynx | 0 (0%) | 2 (18%) | 2 (13%) |
Epipharynx | 0 (0%) | 1 (9%) | 1 (6%) |
GTV (ml) median (range) | |||
CT | 16.4 (6.4–28.4) | 16,8 (2.8–173) | 16.9 (2.8–173) |
MRI | 14.8 (7.4–27.7) | 16.4 (3.3–183) | 15.5 (3.3–183) |
Follow-up (years) median (range) | 3 (2.5-3) | 3 (0.5–3.5) | 3 (0.5–3.5) |