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Table 3 Conventionally fractionated stereotactic radiation therapy in recurrent  patients with glioblastoma

From: Current status and recent advances in reirradiation of glioblastoma

Author

Pts

Interval between RT courses

RT modality

Median dose/fractions

Imaging for planning

Median target volume (ml)

CTV/PTV margins (mm)

Systemic therapy

Median PFS (months)

Median OS (months)

EQD2 (Gy)

Cumulative EQD2 (Gy)

RN (%)

Combs et al., 2005 [74]

59

10

LINAC

36 Gy/18 fr

T1-w ce MRI

49.3 (2.5–636)

5–10 mm

TMZ, Carmustine, PCV, 36

5 (1–21)

8 23% at 1 year

36

96

0.6

Sholtyssek et al., 2013 [75]

53

13.4

LINAC

36 Gy/18 fr*

T1-w ce MRI

110.4. (1.8– 378)

CTV, 5 mm; PTV, 3–5 mm

TMZ,12; Carbo/etoposide, 24

4.3 33% at 6 m

7.7 24% at 1 year

36

96

0

Flieger et al., 2014 [76]

49

NR

LINAC

36 Gy/18 fr*

T1-w ce MRI

34.9 (1.95–157.9)

5–10 mm

CHT, 38; BEV,18

4.9

7.8

36

96

0

Wick et al., 2014 [77]

91

21

LINAC

36 Gy/18 fr

T1-w ce MRI

size > 2.5 cm in 35 pts

10 mm

SRT + APG101, 58 SRT, 21

2.5. 4.5(+ APG101)

SRT, 11.5; SRT + APG101, 11.5

36

96

1.2

Schnell et al., 2017 [78]

85

18.5

LINAC

36 Gy/18 fr

T1-w ce MRI

128

5–10 mm

Concomitant BEV, 33; Concomitant/ manteinance BEV, 25; BEV + IRI, 27

NR

concomitant BEV, 8; concomitant/ manteinance BEV, 13.1; BEV + IRI, 6.6

36

96

0

Shen et al., 2018 [79]

63

27.6

LINAC

41.4 Gy/23 fr

T1-w ce, DCE, DSC MRI

202 (20–901)

5–10 mm

TMZ, 35; BEV, 5; TMZ/BEV, 6

NR

6.7

41.4

101.4

3.4

Fleischmann et al., 2019 [30]

124

18

LINAC

36 Gy/18 fr*

T1-w ce MRI

118.1 (22.6–385.5)

CTV, 5 mm PTV, 3 mm

BEV, 95

5

9

36–48.4

96–108.4

6.9

  1. LINAC, linear accelerator; CTV, clinical target volume; PTV, planning target volume; PFS, progression-free survival; OS, overall survival; EQD2, equivalent dose normalized to 2 Gy;
  2. *Majorty of patients; SRT, stereotactic radiotherapy; T1-w ce MRI, T1-weighted contrast-enhanced magnetic resonance imaging; DCE, dynamic contrast enhanced; DSC, dynamic susceptibility;
  3. BEV, bevacizumab; TMZ, temozolomide; IRI, irinotecan; Carbo, carboplatin