| Modality | Appearance |
| CT | |
| Unenhanced | High attenuation |
| Contrast-enhanced | Intense enhancement, often ringlike* |
| MR imaging | |
| T1-weighted | Isointense to hyperintense |
| Contrast-enhanced T1-weighted | Intense enhancement, often ringlike* |
| T2-weighted | Hypointense |
| PET/SPECT | Hypermetabolic |
| *Observed especially in immunocompromised patients. |