What is a Brain Tumour?

What is a Brain Tumour?

  • A brain tumour is a mass of abnormal cells within or around the structure of the brain.
  • A brain tumour can be benign or malignant, and can be primary or secondary. 

 The difference between Primary and Secondary Brain Tumours:

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.
 

The difference between Non-Malignant (Benign) and Malignant Brain Tumours :

Non-Malignant (Benign) Brain Malignant Brain Tumours
WHO* Grade 1 or 2

Slow growing

Well defined borders

Does not invade surrounding tissue
 
WHO* Grade 3 or 4

Fast growing

Poorly defined borders

Can invade surrounding tissue and structures
 

You can learn about how a brain tumour is diagnosed here

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