Table 1.

Distinguishing features of type I and type II choroid plexus brain carcinomas

Type IType II
Gross morphologyGreater tumor volumeSmaller tumor volume
High cell densityLow cell density
Homogeneous cellsDysplastic cells
Perivascular polarityNo perivascular polarity
Tumor blood vesselsAbundant vesselsFewer blood vessels
p53 statusInactiveActive