MR imaging features by tumor group after excluding pineoblastomas (n = 29)
| Group | P Value | ||||||
|---|---|---|---|---|---|---|---|
| ET | Non-ET | All Patients | |||||
| No. | % | No. | % | No. | % | ||
| Size (cm) | .95 | ||||||
| Median | 5.7 | – | 6.2 | – | 6.1 | – | |
| Minimum | 3.6 | – | 2.7 | – | 2.7 | – | |
| Maximum | 9.1 | – | 9.3 | – | 9.3 | – | |
| % Enhancement | .68a | ||||||
| None | 0 | 0 | 0 | 0 | 0 | 0 | |
| 0–25 | 2 | 20 | 3 | 15.8 | 5 | 17.2 | |
| 25–75 | 5 | 50 | 7 | 36.8 | 12 | 41.4 | |
| >75 | 3 | 30 | 9 | 47.4 | 12 | 41.4 | |
| Margins | .068 | ||||||
| Well-defined | 10 | 100.0 | 13 | 68.4 | 23 | 79.3 | |
| Ill-defined | 0 | 0 | 6 | 31.6 | 6 | 20.7 | |
| Presence of edema | .24b | ||||||
| Absent | 5 | 50 | 5 | 26.3 | 10 | 34.5 | |
| <2 cm from tumor margin | 4 | 40 | 13 | 68.4 | 17 | 58.6 | |
| >2 cm from tumor margin | 1 | 10 | 1 | 5.3 | 2 | 6.9 | |
| Presence of cyst/necrosis | .53 | ||||||
| Absent | 0 | 0 | 3 | 15.8 | 3 | 10.3 | |
| Present | 10 | 100 | 16 | 84.2 | 26 | 89.7 | |
| Presence of calcification or hemorrhage | .11 | ||||||
| Absent | 6 | 60 | 5 | 26.3 | 11 | 37.9 | |
| Present | 4 | 40 | 14 | 73.7 | 18 | 62.1 | |
| DWI | – | ||||||
| Bright | 9 | 90 | 15 | 78.9 | 24 | 82.8 | |
| Dark | 0 | 0 | 0 | 0 | 0 | 0 | |
| Intermediate | 0 | 0 | 3 | 15.8 | 3 | 10.3 | |
| Artifact or not available | 1 | 10 | 1 | 5.3 | 2 | 6.9 | |
| Metastasis | |||||||
| Intracranial | 0 | 0 | 0 | 0 | 0 | 0 | |
| Spinal | 0 | 0 | 0 | 0 | 0 | 0 | |
| Intracranial and spinal | 0 | 0 | 0 | 0 | 0 | 0 | |
| None | 10 | 100 | 19 | 100.0 | 29 | 100 | |
| All patients | 10 | 100.0 | 19 | 100.0 | 29 | 100.0 | |
Note:— – indicates no data available.
a Comparison of none versus 0%–25% versus 25%–75% versus >75%.
b Comparison of absent versus present.