Table 2.

Patient characteristics

Case	Interval between radiation in months	Age at re-irradiation in years	WHO grading	Tumor location	Dose and fractions, initial radiation in Gy	Volume initial PTV in ccm	Volume re-irradiation PTV in ccm	Percentage of overlap initial and re-irradiation PTV
1	104	43	II	Convex	60 (30 × 2)	86.1	134.9	11.6
2	76	64	II	Convex	60 (30 × 2)	33.3	16.1	0
3	13	75	II	Tentorial, Right	60 (30 × 2)	58.2	7.3	0
4	49	74	I	Parafalcine	54 (30 × 1.8)	27	24.2	68.2
5	13	45	II	Convex	59.4 (33 × 1.8)	178.3	44.6	0
6	18	73	II	Parafalcine	59.4 (33 × 1.8)	88.3	101.9	51.1
7	21	60	II	Parafalcine	60 (30 × 2)	29	14.6	60.6
8	109	74	II	Convex	52.2 (29 × 1.8)	92.8	18.4	44
9	5	58	II	Convex	60 (30 × 2)	26.1	29.9	0
Mean	45.33 (±41,09)	62.89 (±12.47)			58.33 (±3.01)	68.79 (±49.72)	43.54 (±44.51)	26.17 (±29.25)