Bone cancer may be of two basic types:
Primary bone cancer - cancer that begins in the bone
Secondary bone cancer - cancer that begins elsewhere in the body (for example lungs, breast, liver etc.) that has spread to the bone
Primary bone cancer is a rare form of cancer - about 500 cases are diagnosed in the UK each year (only about one in every 500 cancers).
Around 2,600 people in United States of America are diagnosed with primary or secondary bone cancer each year. Bone cancers make for 2% of all cancers in the USA.