Scientists discover how cancer spreads

Related: Cancer

1. Cancer
   1. Melanoma treatment uses immune system to kill cancer cells
   2. Cancer increases bankruptcy risk, even for insured
   3. Author admits to faking bladder cancer
   4. Young patients fight cancer, one video game at a time
   5. Cops: Mom tells son he has cancer to scam friends
2. Top health stories
   1. 'Why would we wait?': Sisters face Jolie cancer dilemma
   2. Making mentally ill defendants ready for trial
   3. ADHD linked to adult obesity, study finds
   4. Fitness protects men from cancer, even 20 years later
   5. Gymnophobics are real-life 'never-nudes'
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