From: A retrospective study of head and neck re-irradiation for patients with recurrent or second primary head and neck cancer: the McGill University experience
Toxicity
Grade 1
Grade 2
Grade 3
Grade 4
Grade 5
Dry mouth
21 %
52 %
7 %
Dysphagia
29 %
36 %
11 %
Trismus
28 %
31 %
Muscle fibrosis
25 %
Vascular
Loss of taste
43 %
Hearing loss
3 %
Radio-osteonecrosis