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Table 1 Selected patient and tumor characteristics

From: Radiation-induced parotid changes in oropharyngeal cancer patients: the role of early functional imaging and patient−/treatment-related factors

Characteristic Parameter
Patient number 40 (80 parotids)
Sex (M/F) 30/10
Age (years)
 Mean (range) 65.5 (46–81)
Primary tumor site
 Tonsil 26 (65%)
 Base of Tongue 14 (35%)
T stage
 T1 4 (10%)
 T2 11 (27.5%)
 T3 7 (17.5%)
 T4 15 (37.5%)
 T4a 3 (7.5%)
N stage
 N0 4 (10%)
 N1 4 (10%)
 N2a 2 (5%)
 N2b 15 (37.5%)
 N2c 14 (35%)
 N3 1 (2.5%)
Parotid Radiation Dose
 Dmean (Gy) 35.8 ± 8.9
 V30(%) 53.6 ± 19.9
  1. Abbreviations: Dmean Planned mean dose to the parotid gland, V30(%) Percentage of parotid volume receiving a dose ≥30 Gy