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Table 4 Eustachian tube functions according to dose of radiotherapy

From: Effect of head and neck radiotherapy on the Eustachian tube functions

Dose Tympano before radiography at both ears Tympano after radiotherapy at ipsilateral ear Tympano after radiotherapy at contralateral ear Tympano 12 weeks after radiotherapy at ipsilateral ear Tympano 12 weeks after radiotherapy at contralateral ear
60 GY Bil type A
14 ears (23.3%)
A (normal) 4 (57.1%)
B (effusion) 1 (14.3%)
C (ETD) 2 (28.6%)
A (normal) 5 (71.4%)
B (effusion) 0 (0%)
C (ETD) 2 (28.6%)
A (normal) 5 (71.4%)
B (effusion) 1 (14.3%)
C (ETD) 1 (14.3%)
A (normal) 7 (100%)
B (effusion) 0 (0%)
C (ETD) 0 (0%)
66 GY Bil type A
28 ears (46.7%)
A (normal) 6 (42.9%)
B (effusion) 2 (14.2%)
C (ETD) 6 (42.9%)
A (normal) 10 (71.4%)
B (effusion) 1 (7.1%)
C (ETD) 3 (21.3%)
A (normal) 9 (64.4%)
B (effusion) 1 (7.1%)
C (ETD) 4 (28.5%)
A (normal) 11 (78.7%)
B (effusion) 1 (7.1%)
C (ETD) 2 (14.2%)
70 GY Bil type A
18 ears (30%)
A (normal) 4 (44.5%)
B (effusion) 3 (33.3%)
C (ETD) 2 (22.2%)
A (normal) 7 (77.8%)
B (effusion) 1 (11.1)
C (ETD) 1 (11.1%)
A (normal) 8 (88.9%)
B (effusion) 0 (0%)
C (ETD) 1 (11.1%)
A (normal) 7 (77.8%)
B (effusion) 1 (11.1%)
C (ETD) 1 (11.1%)