Comparison of demographic and conventional MR imaging characteristics between low- and high-grade PITs
| Characteristics | Low-Grade Tumor | High-Grade Tumor | P Value |
|---|---|---|---|
| Demography | |||
| Age (mean) (yr) | 9.71 (SD, 3.66) | 9.02 (SD, 4.11) | .51 |
| Male sex (No.) (%) | 17 (65.4%) | 23 (82.1%) | .16 |
| Location (No.) | .13 | ||
| Cerebral hemisphere | 9 | 5 | |
| Cerebellum | 12 | 11 | |
| Basal ganglia/brain stem | 3 | 3 | |
| Other | 2 | 9 | |
| Conventional MR imaging | |||
| Cystic degeneration (No.) (%) | 16 (61.5%) | 13 (46.4%) | .27 |
| Hemorrhage (No.) (%) | 5 (19.2%) | 10 (35.7%) | .18 |
| Necrosis (No.) (%) | 5 (19.2%) | 14 (50.0%) | .02 |
| Enhancement (No.) (%) | 21 (80.8%) | 25 (89.3%) | .62 |
| Peritumoral edema (No.) (%) | 10 (38.5%) | 15 (53.6%) | .27 |
| Clear margin (No.) (%) | 14 (53.8%) | 13 (46.4%) | .59 |