Imaging and pathologic findings
| Tumor Type/Imaging Findings | En Plaque | Dumbbell | Fusiform | Total | Percentage |
|---|---|---|---|---|---|
| Tumor location | |||||
| Cervical spine | 8 | 4 | 0 | 12 | 86% |
| Thoracic spine | 1 | 0 | 1 | 2 | 14% |
| Well-defined boundary | 0 | 1 | 1 | 2 | 14% |
| Dural thickening | 8 | 3 | 0 | 11 | 79% |
| Dural calcification | 6 | 2 | 0 | 8 | 57% |
| Adherence to nerve roots | 7 | 4 | 0 | 11 | 79% |
| Neural foramen enlargement | 6 | 4 | 0 | 10 | 71% |
| Bone erosion | 2 | 3 | 0 | 5 | 36% |
| Intradual invasion | 4 | 4 | 0 | 8 | 57% |
| Epidural mass formation | 7 | 4 | 1 | 12 | 86% |
| Spinal cord compression | 8 | 3 | 1 | 12 | 86% |
| T1WI | |||||
| Isointensity | 6 | 2 | 0 | 8 | 57% |
| Hypointensity | 3 | 2 | 1 | 6 | 43% |
| T2WI | |||||
| Isointensity | 3 | 2 | 0 | 5 | 36% |
| Hypointensity | 5 | 2 | 0 | 7 | 50% |
| Heterogeneous | 1 | 0 | 1 | 2 | 14% |
| Dural tail sign | 8 | 4 | 1 | 13 | 93% |
| Tumor enhancement | |||||
| Moderate | 2 | 3 | 0 | 5 | 36% |
| Marked | 7 | 1 | 1 | 9 | 64% |
| Pathologic type | |||||
| Psammomatous | 7 | 3 | 0 | 10 | 71% |
| Meningothelial | 1 | 1 | 0 | 2 | 14% |
| Transitional | 1 | 0 | 0 | 1 | 7% |
| Angiomatous | 0 | 0 | 1 | 1 | 7% |