Neuro

Question 1

Pineal Tumour - intermediate T1 + T2 signal, avid enhancement, central calcification

Answer 1

Germinoma
- most common pineal tumour, more common in males.

vs pineoblastoma.
1. germinoma shows greater enhancement
2. central calcification in germinoma, peripheral in pineoblastoma (exploded pineal gland appearance)

Pineocytoma - older age group, more solid, do not enhance.

Pineal cyst

Question 2

Ring enhancing lesions

Answer 2

M - mets (will not restrict diffusion)
A - Abscess (restrict diffusion)
G - Glioblastoma
I - Infarct
C - Contusion
D -Demyelinating disease
R