Table 1.
Characteristics of patients (n = 77) with skull-base chondrosarcoma treated with pencil beam scanning proton therapy
| Number of Patients (%) | |
|---|---|
| Sex | |
| Male | 35 (45.5) |
| Female | 42 (54.5) |
| Age (y) | |
| Median | 38.9 |
| Range | 10.2–70.0 |
| Gross tumor volume (cm3) | |
| Median | 25.9 |
| Range | (1.3–191.8) |
| Grade (WHO) | |
| Low grade | 73 (94.8) |
| High grade | 4 (5.2) |
| Proton therapy delivered at | |
| Initial diagnosis | 62 (80.5) |
| Progression | 15 (19.5) |
| Brainstem compression | |
| No | 56 (72.7) |
| Yes/abutment | 21 (27.3) |
| Optic apparatus compression | |
| No | 47 (61.0) |
| Yes/abutment | 30 (39.0) |
| Brainstem or optic apparatus compression | |
| No | 38 (49.4%) |
| Yes/abutment | 39 (50.6%) |
Abbreviations: WHO, World Health Organization.