Intraventricular Tumors

Question 1

Central Neurocytoma

Answer 1

Best diagnostic clue: “Bubbly” mass in frontal horn or body of lateral ventricle attached to septum pellucidum. May involve 3rd ventricle

Hydrocephalus, Ca++ common, flow voids

T1 heterogenous. iso with hypo cystic components
T2 bright
FLAIR bright
C+ Moderate to strong heterogeneous enhancement

Question 2

Choroid Plexus Papilloma/Carcinoma

Answer 2

Best Diagnostic clue: Child with strongly enhancing lobulated (cauliflower-like) intraventricular mass (atrium of 3rd or 4th)

T1 hypo
T2 hyper
C+ intense enhancement
VERY lobulated/cauli like mass in atrium of 3rd in children or 4th ventricle in adults

Question 3

Intraventricular Meningioma

Answer 3

T1 hypo
T2 hyper
C+ homogenous enhancement

Question 4

Subependymal Giant Cell Astrocytoma SEGA

Answer 4

Enhancing mass in the lateral ventricle near the foramen of monro

associated with tuberous sclerosis (look for subependymal nodules and hamartomas)

Question 5

Subependymoma

Answer 5

T1 iso/hypointense
T2 hyperintense
C+ NO ENHANCEMENT

middle aged, obex of 4th or foramen of monro in the lateral ventricle.