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Table 2 Choices of treatment modality according to purpose of RT (n = 529)

From: Patterns of radiotherapy practice for biliary tract cancer in Japan: results of the Japanese radiation oncology study group (JROSG) survey

  Purpose of RT   Treatment modality (%) median EQD2(range) Gyα/β10
   Actual patients EBRT alone ILBT alone ILBT + EBRT
Surgery+ Curative intent (R0-1) 183 170 (92.9) 8 (4.4) 5 (2.7) 50 (6–90)
  Non-curative intent (R2) 33 31 (93.9) 1 (3.0) 1 (3.0) 50 (4–74)
Surgery- Curative 235 177 (75.3) 0 (0) 58 (24.7) 50 (9–68)
  Palliative 78 55 (70.5) 11 (14.1) 12 (15.4) 50 (39–74)
  median EQD2 (range) Gyα/β10   50 (4–90) 36 (14–44) 60 (33–82)  
  1. Abbreviations: RT Radiotherapy; EBRT External beam radiotherapy; ILBT Intraluminal brachytherapy; EQD2 The biologically equivalent dose in 2-gray fractions.