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8 year-old male withheadache.

Ependymoma

PNET

Atypical teratoid/rhabdoid tumor

Teratoma (< 1 yr).

Supratentorial ependymomas = 20-40% of childhood ependymomas

Males>females

Peak incidence 1-5 yrs

Presentation dependent upon location

Headache, seizures most common

Frontal lobe most common.

CT

Foci of Ca++ seen >50%

Areas of cavitation common

MR

Main feature = heterogeneity on T1, T2, and post-gad imaging

Ca++

Cysts +/- hemorrhage.