Demographic and imaging features

VariableNumber of cases (%)
AgeMean (SD)13
GenderFemale 13 (52.0)
Male 12 (48.0)
Laterality
Left 16 (64.0)
Right9 (36.0)
LobeFrontoparietal7 (28.0)
Frontal11 (44.0)
Frontotemporal2 (8.0)
Parietooccipital3 (12.0)
Parietotemporal2 (8.0)
SizeMean (SD)6.5
LocationIntraventricular4 (16.0)
Purely cortical6 (24.0)
Periventricular15 (60.0)
T1 signalHyperintense7 (28.0)
Isointense18 (72.0)
HemorrhageNo17 (68.0)
Yes8 (32.0)
T2 signalHyperintense1 (4.0)
Hypointense11 (44.0)
Isointense13 (52.0)
Postcontrast T1Heterogeneous25 (100.0)
Restricted diffusionNo3 (12.0)
Yes22 (88.0)
SWI hypointensityNo5 (20.0)
Yes20 (80.0)
Cystic componentYes19 (76.0)
No6 (24.0)
Cyst T1 signalHyperintense18 (94.7)
Hypointense1 (5.3)
Cystic post contrast enhancementNo2 (10.5)
Yes17 (89.5)
Blood in cystNo14 (73.7)
Yes5 (26.3)
Cyst sizeMean (SD)4.1
Cyst FLAIR signalHyperintense18 (72.0)
Hypointense1 (4.0)
NAD6 (24.0)
NecrosisNo5 (20.0)
Yes20 (80.0)
Solid component size with necrosisMean (SD)4.6
EdemaNo6 (24.0)
Yes19 (76.0)
Periwinkle sign/Stellate signNo8 (32.0)
Yes17 (68.0)
Calcification on CTNo0 (0.0)
Yes13 (100.0)

SD: standard deviation