MR imaging features of MEGNTs
| All | Temporal | Pineal | Extratemporal | |
|---|---|---|---|---|
| Mean maximum diameter (cm) | 5.3 | 3.2 | 2.7 | 6.8 |
| Cyst/necrosis (+) | 80% | 0% | 100% | 100% |
| Flow voids (+) | 60% | 50% | 0% | 83% |
| Perilesional edema (+) | 80% | 50% | 50% | 100% |
| Calcification/hemorrhage (+) | 50% | 50% | 50% | 50% |
| T1WI+C enhancement | 100% | 0% | 50% | 100% |
| Leptomeningeal/dural extension (+) | 50% | 0% | 0% | 100% |
| CSF distant metastases | 30% | 50% | 50% | 17% |
| Mean ADC value (10–6 mm2/s) | 737 | 795 | 1008 | 658 |
Note:—T1WI+C indicates T1 weighted imaging with contrast.