Type | Content | Location |
Type A | Clear water or CSF-like fluid | A1 Extratumoural, CSF surrounded by arachnoid membrane A2 Extratumoural, clear water without the presence of arachnoid membrane |
Type B | Xanthochromic fluid | B1 Extratumoural, no wall B2 Intratumoural, thin rim of enhancing tumour surrounding the cyst or enhancing nodule |
Type C | Dark brown or yellow dirty fluid | Intratumoural |
Type D | Contains both clear-water | Extratumoural or peritumoural cysts and dark brown intratumoural small cysts |