Table 3 MRI features of the typical fungal abscess, C. bantiana cerebral abscess, pyogenic abscess and the tubercular abscess [17]
Fungal abscess | Cerebral phaeohyphomycosis | Pyogenic abscess | Tubercular abscess | |
|---|---|---|---|---|
DWI | Peripheral restricted diffusion | Peripheral restricted diffusion | Central restricted diffusion | Central restricted diffusion |
SWI | Blooming artifacts may be present | Blooming artifacts may be present | No | No |
Wall | Usually, crenated and lobulated | Crenated and lobulated | Usually smooth or lobulated | Usually smooth or lobulated |
T1FS C+ | Ring enhancement | Ring enhancement | Ring enhancement | Ring enhancement |
T2W hypointense projections | Present | Present | Absent | Absent |
T2W | – | Concentric target sign | – | – |
T1W | Hypointense or hyperintense | Hypointense or Hyperintense (due to the rich melanin pigment and/or blood products) | Hypointense | Hypointense |
MRS | Trehalose → 3.6 ppm Lipid-Lactate → 1.3 ppm | Trehalose → 3.6 ppm Succinate → 2.4 ppm Choline → 3.2 ppm Lipid-Lactate → 1.3 ppm | Amino acid → 0.9 ppm Succinate → 2.4 ppm Acetate → 1.9 ppm Lactate → 1.3 ppm Lipid-Lactate → 1.3 ppm | Lipid → 1.3 ppm |