CNS lesions (paeds)

Question 1

Ependymoma

Answer 1

Heterogenous mass in the 4th ventricle (child)
Extrudes into Foramen of luschka and magendie
paraventricular or transependymal invasion
Calcs, cysts and haemorrhage.

Question 2

Medulloblastoma

Answer 2

Hyperdense mass at the cerebellar vermis
Low signal on T2 and ADC due to hypercellularity

Question 3

AT/RT

Answer 3

Looks like medulloblastoma but in < 4yrs old

Question 4

Juvenile pilocytic astrocytoma

Answer 4

Cyst with enhancing nodule. May have internal or adjacent cysts

Question 5

DNET

Answer 5

Non enhancing cystic/bubbly mass at the cerebral cortex usually temporal

Question 6

Ganglioglioma/gangliocytoma

Answer 6

Partially enhancing mass at cerebral cortex

Question 7

Dysplastic cerebellar gangliocytoma

Answer 7

Lhermitte Dulcos disease
non enhancing mass expands cerebellar folia causing striated cerebellum
Associated with ~COWDEN syndrome

Question 8

Desmoplastic infantile astrocytoma

Answer 8

heterogneous mixed cystic/solid mass
cyst and nodule cerebral cortex
< 2yrs old
Rapid macrocephaly