Primary bone cancer refers to cancers which start in the bone. These are different to secondary bone cancers which started in other parts of the body and later spread to the bones.
Bone cancers are tumours which have the potential to spread to other parts of the body. These are different to benign (non-cancerous) bone tumours which do not spread. Benign bone tumours are more common than malignant (cancerous) bone tumours.
This FAQ is primarily about cancers that start in the bone (primary bone cancer).
See also: What are the different types of primary bone cancer ?
See also: What is secondary bone cancer ?