From: Cochlea sparing effects of intensity modulated radiation therapy in head and neck cancers patients: a long-term follow-up study
Grade 0
Grade 1
Grade 2
Grade 3
Grade 4
Total Grade 1-4
Short-term
22 (61%)
6 (17%)
4 (11%)
0
14 (39%)
Long-term
23 (64%)
3 (8%)
13 (36%)