'Silent killer' not so deadly

A third of women diagnosed with breast cancer in public screening programs are treated needlessly because their tumor is not life-threatening, the British Medical Journal (BMJ) reports.

A study by Scandinavian experts highlighted the dilemma facing doctors when it comes to detecting and treating breast cancer - the notorious "silent killer" of women, thus named for the way it can stealthily claim lives.

Not all breast cancers kill, though.