|Primary Brain Tumours||Secondary Brain Tumours (or Metastatic)|
|Originated from cells within the brain.
Primary brain tumours stay within the brain or spinal cord.
|Originated from cells from somewhere else in the body.
Common for other cancers to move, i.e. breast, lung, melanoma, etc.
|Non-Malignant (Benign) Brain||Malignant Brain Tumours|
|WHO* Grade 1 or 2
Well defined borders
Does not invade surrounding tissue
|WHO* Grade 3 or 4
Poorly defined borders
Can invade surrounding tissue and structures
You can learn about how a brain tumour is diagnosed here.
Information taken from https://www.braintumour.ca/1654/what-is-a-brain-tumour