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Table 4 Summary of the dose assessment for the recurrence volumes

From: Assessment and topographic characterization of locoregional recurrences in head and neck tumours

Type Group Vol ± SD/cm 3 Presc D/Gy D mean± SD [min-max] D 98%± SD [min-max]
Local CTV-T (def.) 14.0 ± 14.4 70.2 69.6 ± 2.4 [66.6 – 74.2] 65.5 ± 2.5 [63.1 – 70.8]
CTV-T (post-op) 9.3 ± 12.8 59.4-64.8 60.3 ± 4.6 [57.1 – 65.6] 58.4 ± 5.8 [54.8 – 65.1]
CTV-N (3 cases) 1.4 ± 1.1 70.2 69.1 ± 0.8 [68.4 – 69.9] 66.6 ± 1.8 [64.7 – 68.3]
Regional CTV-N1 14.5 ± 18.0 54-59.4 57.9 ± 6.4 [52.2 – 68.3] 48.6 ± 16.8 [21.5 – 66.9]
CTV-N2 15.6 ± 16.3 50.4 50.4 ± 1.3 [49.4 – 51.3] 39.3 ± 10.2 [32.1 – 46.5]
  Outfield 19.5 ± 26.8   31.4 ± 17.0 [8.9 – 54.6] 21.5 ± 20.3 [0.7 – 52.1]
  1. Vol refers to the average volume of the recurrences for each group.
  2. CTV-T stands for the clinical target volume of the primary tumour, CTV-N for large adenopathies, CTV-N1 for high risk lymph nodes and CTV-N2 for low risk lymph nodes. Def stands for definitive RT and post-op to post-operative.