Supratentorial PNETs:
- Comprise 2.5-3% of all childhood brain tumors10
- Very rare in adults14
- <10% of PNET are supratentorial14
- Slight male predominance25
Location
Most supratentorial PNETs arise from:
- Cerebral hemispheres - frontal, temporal or parietal lobes
- Pineal region10
- Less commonly supratentorial PNETs arise in deeper regions:
- Basal ganglia, diencephalon and corpus collosum6
- Intraventricular or peri-ventricular epicenter10
The MR scan below (axial T1, post gad) shows a supratentorial PNET arising in the pineal region (P = pineoblastoma) in a 4 year old boy.
Try this link to the Brain Lesion Locator
Differential Diagnosis by Location
Developed by: James G. Smirniotopoulos, M.D
