Table 2.

Treatment characteristics for patients with extremity STS treated with protons.

Parameter	Overall (N = 20)
Timing of radiation, n (%)
Postoperative	2 (10.0)
Preoperative	18 (90.0)
Reirradiation, n (%)
Yes	3 (15.0)
No	17 (85.0)
Previous treatment, n (%)
Photons	3 (100.0)
Previous dose, n (%)
5000	2 (66.7)
6000	1 (33.3)
Age at RT start
Mean (SD)	49.4 (19.9)
Median	51.5
Range	19.0–78.0
Total proton dose, n (%), cGy
3000	1 (5.0)
4500	1 (5.0)
5000	16 (80.0)
6000	1 (5.0)
6600	1 (5.0)
IORT	9 (45)
IORT dose
Median	1250.0
Range	950.0–1750.0
Electron energy, n (%), MeV
6	2 (22.2)
9	7 (77.8)

Abbreviations: STS, soft tissue sarcoma; RT, radiotherapy; cGy, centigray; IORT, intraoperative electron radiotherapy.