TABLE 3. Radiotherapy.

Characteristic	All patients	Patients with primary tumors	Patients with local recurrence
Number of patients	28	20	8
External-beam radiation median dose, Gy (range)	50.0 (37.5–66.6)	50.0 (45–66.6)	50.2 (37.5–54)
Type of external-beam radiation, n (%)
Proton beam	10 (35.7%)	6 (30.0%)	4 (50.0%)
Intensity modulated	11 (39.3%)	8 (40%)	3 (37.5%)
Both proton beam and intensity modulated	7 (25%)	6 (30.0%)	1 (12.5%)
Timing of external-beam radiation, n (%)
Preoperative	20 (71.4%)	14 (70%)	6 (75%)
Postoperative	6 (21.4%)	5 (25%)	1 (12.5%)
Both preoperative and postoperative	2 (7.1%)	1 (5.0%)	1 (12.5%)
Intraoperative radiation
Patients, n (%)	12 (42.9%)	8 (40%)	5 (62.5%)
Median dose, Gy (range)	11 (6–15)	11.75 (7.5–15)	10 (6–12.5)