Table 2.
Diagnostic imaging findings of dogs with histiocytic sarcomas involving the spinal cord (n = 5)
| Location relative to spinal cord parenchyma | |
| Intradural‐extramedullary | 2 |
| Intramedullary | 2 |
| Diffuse meningeal | 1 |
| Anatomic location of discrete masses | |
| Cervical | 1 |
| Thoracic | 2 |
| Lumbar/sacral | 1 |
| Intensity (relative to normal gray matter) | |
| T1‐weighted | |
| Hypointense | 1 |
| Isointense | 4 |
| T2‐weighted | |
| Hyperintense | 2 |
| Mixed | 3 |
| STIR | |
| Hyperintense | 4 |
| Not performed | 1 |
| T2* susceptibility artifact | |
| No | 1 |
| Not performed | 4 |
| Contrast enhancement of tumor | |
| Degree | |
| Mild | 1 |
| Moderate | 1 |
| Marked | 3 |
| Pattern | |
| Homogeneous | 2 |
| Heterogeneous (patchy) | 3 |
| Contrast enhancement of meninges | |
| Degree | |
| Mild | 1 |
| Marked | 4 |
| Pattern | |
| Localized | 1 |
| Diffuse | 4 |
| Tumor margins | |
| Distinct | 3 |
| Indistinct | 2 |
| Presence of mass effect | |
| Yes | 5 |
| Attenuation on HASTE images | |
| Yes | 4 |
| No | 1 |
| Degree of peritumoral edema | |
| Mild | 1 |
| Moderate | 1 |
| Marked | 2 |
| Unclear | 1 |
STIR, short tau inversion recovery; HASTE, half‐Fourier acquisition single‐shot turbo spin echo.