Benign: Not cancerous. Benign tumors can grow large but do not spread to other parts of the body.

Bilateral: Affecting both sides of the body.

Biopsy: A short operation to remove a small piece of tissue which is sent to a lab to see if it contains cancer cells.

Bone Metastases: Cancer that has spread from the original site to the bone.

Bone Scan: A technique to create images of bones on a computer screen. A small amount of radioactive material is injected into a blood vessel and travels through the bloodstream where it collects in the bones and is detected by the scanning machine.