| MRI findings | Number (n) | Percentage (%) |
| Tumor location |
|
|
| Above S3 | 0 | 0% |
| Below S3 | 7 | 100% |
| Tumor Size (cm) | Range: 5.9 cm; Mean: 2.8 - 10.5 cm |
|
| Involvement of surrounding structures | 4 | 57.1% |
| Tumor morphology |
|
|
| Cystic | 6 | 85.7% |
| Solid | 1 | 14.3% |
| Signal intensity |
|
|
| Homogeneity | 7 | 100% |
| Heterogeneity | 0 | 0% |
| Tumor margin |
|
|
| Sharp | 7 | 100% |
| Irregular/Infiltrative | 0 | 0% |
| Gadolinium enhancement | 3 | 42.9% |
| Septation |
|
|
| Unilocular | 3 | 42.9% |
| Polylocular | 4 | 57.1% |
| Preferable diagnosis |
|
|
| Tailgut cyst | 5 | 71.4% |
| Chordoma | 1 | 14.3% |
| Endometriosis | 1 | 14.3% |