Table 2.
Morphological features of MPNSTs (n = 12) versus BPNSTs (n = 55) on MRI
| Parameter | MPNSTs (%) | BPNSTs (%) | P |
|---|---|---|---|
| n | 12 (18) | 55 (82) | ‒ |
| Largest diameter, mm | 0.1407 | ||
| Mean ± SD | 72 ± 75 | 35 ± 15 | |
| Range | 20–290 | 20–103 | |
| Shape | 0.0133 | ||
| Round shape | 6 (50) | 47 (85) | |
| Irregular shape | 6 (50) | 8 (15) | |
| Margin definition | <0.0001 | ||
| Well-defined | 6 (50) | 55 (100) | |
| Ill-defined | 6 (50) | 0 (0) | |
| Intratumoral lobulation | 0.0293 | ||
| Present | 4 (33) | 4 (7) | |
| Absent | 8 (67) | 51 (93) | |
| Intratumoral heterogeneity | <0.0001 | ||
| Heterogeneous | 11 (92) | 5 (9) | |
| Homogeneous | 1 (8) | 50 (91) | |
| Intratumoral cystic changes | 0.0006 | ||
| Present | 4 (33) | 1 (2) | |
| Absent | 8 (67) | 54 (98) | |
| Target sign | 0.055 | ||
| Present | 0 (0) | 23 (42) | |
| Absent | 12 (100) | 32 (58) | |
| Peritumoral edema | <0.0001 | ||
| Present | 11 (92) | 1 (2) | |
| Absent | 1 (8) | 54 (98) |